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((short description|None))

((Main|History of zoology through 1859|History of zoology since 1859))
((Multiple issues|
((tone|date=November 2020))
((excessive examples|date=November 2020))
((more citations needed|date=February 2011))
))
This is a chronologically organized listing of notable [[Zoology|zoological]] events and discoveries.

== Ancient world ==
*28000 BC. [[Cave painting]]s (e.g. [[Chauvet Cave]]) in [[Southern France]] and northern [[Spain]] depict animals in a stylized fashion. These European cave paintings depict [[Mammoth]]s (the same species is later seen thawed ice in [[Siberia]]).
*12000-8000 BC. [[Bubalus Period]] creation of rock art in the Central Sahara depicting a range of animals including [[elephants]], [[antelopes]], [[rhinoceros]] and [[catfish]].
*10000 BC. Humans (''[[Homo sapiens]]'') [[domestication|domesticated]] [[dog]]s, [[pig]]s, [[sheep]], [[goat]]s, [[fowl]], and other animals in [[Europe]], [[North Africa|northern Africa]] and the [[Near East]].<ref>Charles A. Reed. Animal Domestication in the Prehistoric Near East: The origins and history of domestication are beginning to emerge from archeological excavations. ''[[Science (journal)|Science]]'', Vol. 130, no. 3389 (December 11, 1959), pp. 1629–1639</ref>
*6500 BC. The [[aurochs]], ancestors of domestic [[cattle]], were domesticated in the next two centuries if not earlier (Obre I, [[Yugoslavia]]). This was the last major animal to be tamed as a source of milk, meat, power, and leather in the [[Old World]].
[[File:Lascaux painting.jpg|thumb|[[Lascaux]] aurochs, [[Stone Age]]<ref>[http://www.culture.gouv.fr/culture/arcnat/lascaux/en/ Lascaux, a visit to the cave.]</ref>]]
*3500 BC. [[Sumer]]ian animal-drawn wheeled vehicles and plows were developed in [[Mesopotamia]], the region called the "[[Fertile Crescent]]". [[Irrigation]] was probably done using animal power. Since Sumeria had no natural defenses, armies with mounted [[cavalry]] and [[chariot]]s became important which increased the importance of equines ([[horse]]s and [[donkey]]s).
*2000 BC. Domestication of the [[silkworm]] in [[China]].
*1100 BC. Won Chang (China), first of the [[Zhou Dynasty|Zhou]] emperors, stocked his imperial [[zoo|zoological garden]] with [[deer]], [[goat]]s, [[bird]]s, and [[fish]] from many parts of the world. The emperor also enjoyed sporting events with the use of animals.
*850 BC. [[Homer]] ([[Greeks|Greek]]) wrote the epics [[Iliad]] and [[Odyssey]], both of them containing some correct observations on [[bee]]s and [[Maggot|fly maggots]], while using animals as [[monster]]s and [[metaphor]]s (gross soldiers turned into [[pig]]s by the witch [[Circe]]) and  Both epics refer to [[mule]]s.
*610 BC. [[Anaximander]] (Greek, 610 BC–545 BC) was a student of [[Thales of Miletus]]. He was taught that the first life was formed by [[spontaneous generation]] in the mud. Later animals came into being by transmutations, left the water, and reached dry land. Man was derived from lower animals, probably aquatic. His writings, especially his poem ''On Nature'', were read and cited by [[Aristotle]] and other later philosophers, but are lost now.
*563? BC. [[The Buddha|Buddha]] (Indian, 563?–483 BC) had gentle ideas on the treatment of animals. He said that animals are held to have intrinsic worth, not just the values they derive from their usefulness to man.
*500 BC. [[Empedocles]] of Agrigentum (Greek, 504–433 BC) reportedly rid a town of [[malaria]] by draining nearby swamps. He proposed the theory of the [[Humorism|four humors]] and a natural origin of living things.
[[File:Akrotiri blue monkeys.jpg|thumb|"Blue Monkeys" [[Bronze Age]] [[Akrotiri (prehistoric city)|Akrotiri]]]]
*500 BC. [[Xenophanes]] (Greek, 576–460 BC), a disciple of [[Pythagoras]] (570–497 BC), first recognized [[fossil]]s as animal remains and inferred that their presence on mountains indicated the latter had once been beneath the sea. "If horses or oxen had hands and could draw or make statues, horses would represent the forms of gods as horses, oxen as oxen." [[Galen]] (130–216 AD) revived interest in fossils that had been rejected by Aristotle, and the speculations of Xenophanes were again viewed with favor.
*470 BC. [[Democritus]] of Abdera (Greek, 470–370 BC) made dissections of many animals and humans. He was the first Greek philosopher-scientist to propose a classification of animals, dividing them into blooded animals (Vertebrata) and bloodless animals (Evertebrata). He also held that lower animals had perfected organs and that the brain was the seat of thought.
*460 BC. [[Hippocrates]] (Greek, 460–370 BC), the "Father of Medicine", used animal dissections to advance human anatomy.
*440 BC. [[Herodotus]] of Halikarnassos (Greek, 484–425 BC) treated exotic fauna in his ''Historia'', but his accounts are often based on tall tales. He explored the [[Nile]], but much of [[Ancient Egypt|ancient Egyptian civilization]] had already lost to living memory by his time.
*427 BC. [[Plato]] (Greek, 427–347 BC) held that animals existed to serve man, but they should not be mistreated because this would lead people to mistreat others. Others who echoed this opinion are St. [[Thomas Aquinas]], [[Immanuel Kant]], and [[Albert Schweitzer]].
*384 BC. [[Aristotle]]'s (Greek, 384–322 BC) books ''[[History of Animals|Historia Animalium]]'' (9 books), ''((lang|la|De Partibus Animalium))'', and ''((lang|la|De Generatione Animalium))'' set the zoological stage for centuries. He emphasized the value of direct observation, recognized law and order in biological phenomena, and derived conclusions inductively from observations. He believed that there was a natural process of animals that ran from simple to complex. He made advances in marine biology, basing his writings on keen observation and rational interpretation as well as conversations with local [[Lesbos]] fishermen for two years, beginning in 344 BC. His account of male protection of eggs by the barking catfish was scorned for centuries until Louis Agassiz confirmed Aristotle's description.
[[File:Apollo black bird AM Delphi 8140.jpg|thumb|[[Apollo]] with a sacred [[crow]]]]
*323 BC. [[Alexander the Great]] (Macedonian, 356–323 BC) collected animals when he was not busy conquering the known world. He is credited with the introduction of the [[Peafowl|peacock]] into Europe.
*70 BC. Publius Vergilius Maro ([[Virgil]]) (70–19 BC) was a famous Roman poet. His poems ''Bucolics'' (42–37 BC) and ''Georgics'' (37–30 BC) hold much information on animal husbandry and farm life. His ''Aeneid'' (published posthumously) has many references to the zoology of his time.
*36 BC. Marcus Terentius [[Varro]] (116–27 BC) wrote ''((lang|la|De Re Rustica))'', a treatise that includes [[Beekeeping|apiculture]]. He also treated the problem of [[Sterility (physiology)|sterility]] in the [[mule]] and recorded a rare instance in which a [[Fertility|fertile]] mule was bred.
*50. [[Seneca the Younger|Lucius Annaeus Seneca]] (Roman, 4 BC–65 AD), tutor to Roman emperor [[Nero]], maintained that animals have no reason, just instinct, a "stoic" position.

[[File:ViennaDioscoridesEndpaperPeacock.jpg|thumb|[[Peacock]] endpapers from the [[Vienna Dioscurides]]]]
*77. [[Pliny the Elder]] (Roman, 23–79) wrote his ''((lang|la|[[Natural History (Pliny)|Historia Naturalis]]))'' in 37 volumes. This work is a catch-all of zoological folklore, superstitions, and some good observations.
*79. [[Pliny the Younger]] (Roman, 62–113), nephew of [[Pliny the Elder]], inherited his uncle's notes and wrote on beekeeping.
*100. [[Plutarch]] (Roman, 46–120) stated that animals' behavior is motivated by reason and understanding.
*131. [[Galen]] of Pergamum (Greek, 130–216), physician to Roman Emperor [[Marcus Aurelius]], wrote on human anatomy from dissections of animals. His texts were used for hundreds of years, gaining the reputation of infallibility.
*200 c. Various compilers in post-classical and medieval times added to the ''((lang|la|[[Physiologus]]))'' (or, more popularly, the ''Bestiary''), the major book on animals for hundreds of years. Animals were believed to exist to serve man, if not as food or slaves then as moral examples.
*Early third century. Composition of ''De Natura Animalium'' by [[Claudius Aelianus]] (Roman, 175–235.)

==Middle Ages==
[[File:Isidoro di siviglia, etimologie, fine VIII secolo MSII 4856 Bruxelles, Bibliotheque Royale Albert I, 20x31,50, pagina in scrittura onciale carolina.jpg|thumb|''((lang|it|Isidoro di siviglia, etimologie))'',. Bruxelles, Bibliothèque Royale Albert I]]
*600. [[Isidorus Hispalensis]] (Spanish bishop of [[Seville]]) (560–636) wrote ''((lang|la|Origines sive Etymologiae))'', an encyclopedic compendium of ancient knowledge including information on animals that served until the rediscovery of Aristotle and Pliny. Full of errors, it nevertheless was influential for hundreds of years. He also wrote ''((lang|la|De Natura Rerum))''.
*781. [[Al-Jahiz]] (Afro-Arab, 781–868/869), a scholar at [[Basra]], wrote on the influence of environment on animals.
*901. [[Horse]]s came into wider use in those parts of Europe where the [[three-field system]] produces grain surpluses for feed, but hay-fed [[ox]]en were more economical, if less efficient, in terms of time and labor and remained almost the sole source of animal power in southern Europe, where most farmers continued to use the [[Crop rotation|two-field system]].
*1225-1244. [[Thomas of Cantimpré]]‚ (Fleming, 1204?–1275?) wrote ''((lang|la|Liber de Natura Rerum))'', a major 13th-century encyclopedia.

[[File:Detail of Les tres riches heures - March.jpg|thumb|Ploughing with oxen in the 15th century. ''[[Très Riches Heures du Duc de Berry]]'']]
*1244–1248. [[Frederick II, Holy Roman Emperor|Frederick II]] von Hohenstaufen (Holy Roman Emperor) (1194–1250) wrote ''((lang|la|De Arte Venandi cum Avibus))'' (''The Art of [[Hawking (birds)|Hunting with Birds]]'') as a practical guide to [[ornithology]].
[[File:Konradin.jpg|thumb|Falconry [[Manesse Codex]], [[Zürich]]]]
*1244. Vincentius Bellovacensis ([[Vincent of Beauvais]]) (?–1264) wrote ''((lang|la|Speculum Quadruplex Naturale, Doctrinale, Morale, Historiale))'' (1244–1254), a major encyclopedia of the 13th century. This work comprises three huge volumes, of 80 books and 9,885 chapters.
*1254–1323. [[Marco Polo]] (Italian, 1254–1323) provided information on Asiatic fauna, revealing new animals to Europeans. "[[Unicorn]]s" (which may actually have been [[Rhinoceros|rhinos]]) were reported from southern China, but fantastic animals were otherwise not included.
*1255–1270. [[Albertus Magnus]] of [[Cologne]] (Bavarian, 1206?–1280) (Albert von Bollstaedt or St. Albert) wrote ''((lang|la|De Animalibus))''. He promoted Aristotle but also included new material on the perfection and intelligence of animals, especially bees.
*1304–1309. [[Pietro Crescenzi|Petrus de Crescentii]] wrote ''((lang|la|Ruralum Commodorum))'', a practical manual for agriculture with many accurate observations on [[insect]]s and other animals. Apiculture was discussed at length.

[[File:Haarlem Woodcutter.jpg|thumb|[[Bartholomaeus Anglicus]], ''((lang|nl|Vanden proprieteyten der dighen))''.
Haarlem: [[Jacob Bellaert]], 24. December 1485]]
*1492. [[Christopher Columbus]] (Italian) arrives in the [[New World]]. New animals soon begin to overload European zoology. Columbus is said to have introduced cattle, horses, and eight pigs from the [[Canary Islands]] to [[Hispaniola]] in 1493, giving rise to virtual devastation of that and other islands. Pigs were often set ashore by sailors to provide food on the ship's later return. Feral populations of hogs were often dangerous to humans.
*1519–1520. [[Bernal Diaz]] del Castillo (Spanish, 1450?–1500), chronicler of [[Hernán Cortés|Cortez]]'s conquest of [[Mexico]], commented on the zoological gardens of [[Aztecs|Aztec]] ruler [[Moctezuma II|Montezuma]] (1466–1520), a marvel with [[parrot]]s, [[rattlesnake]]s, and other animals.
*1523. [[Gonzalo Fernández de Oviedo y Valdés]](Spanish, 1478–1557), appointed official historiographer of the [[East Indies|Indies]] in 1523, wrote ''Sumario de la Natural Historia delas Indias'' (Toledo, 1527). He was the first to describe many New World animals, such as the [[tapir]], [[opossum]], [[manatee]], [[iguana]], [[armadillo]], [[anteater]]s, [[sloth]], [[pelican]], and [[hummingbird]]s.

==Modern world==
[[File:BelonBirdSkel.jpg|thumb|A comparison of the skeleton of birds and man in Belon's book on birds, 1555]]
*1551–1555. Pierre [[Belon]] (French, 1517–1564) wrote ''((lang|fr|L'Histoire Naturelle des Estranges Poissons Marins))'' (1551) and ''((lang|fr|La Nature et Diversité des Poissons))'' (1555). This latter work included 110 animal species and offered many new observations and corrections to Herodotus. ''((lang|fr|L'Histoire de la nature des oyseaux avec leurs descriptions et naïfs portraicts))'' (1555) was his picture book, with improved animal classification and accurate anatomical drawings. In this he published a man's and a bird's skeleton side by side to show the resemblance. He discovered an armadillo shell in a market in [[Syria]], showing how Muslims were distributing the finds from the New World.
*1551. [[Conrad Gessner]] (Swiss, 1516–1565) wrote ''((lang|la|Historia animalium))'' (Tiguri, 4 vols., 1551–1558, last volume published in 1587) and gained renown. This work, although uncritically compiled in places, was consulted for over 200 years. He also wrote ''((lang|la|Icones animalum))'' (1553) and ''((lang|de|Thierbuch))'' (1563).
*1552  [[Edward Wotton (zoologist)|Edward Wotton]] (English, 1492–1555) published ''((lang|la|De Differentiis Animalium))'', a work that influenced Gessner.
*1554–1555. [[Guillaume Rondelet]] (French, 1507–1566) wrote ''((lang|la|Libri de piscibus marinis))'' (1554) and ''((lang|la|Universe aquatilium historia))'' (1555). He gathered [[vernacular]] names in hope of being able to identify the animal in question. He did go to print with discoveries that disagreed with Aristotle.
*1578. [[Jean de Lery]] (French, 1534–1611) was a member of the French colony at [[Rio de Janeiro]]. He published ''((lang|fr|Voyage en Amerique avec la description des animaux et plantes de ce pays))'' (1578) with observations on the local fauna.
*1585. [[Thomas Harriot]] (English, 1560–1621) was a naturalist with the first attempted English colony in North America, on [[Roanoke Island]], [[North Carolina]]. His ''Brief and True Report of the New Found Land of Virginia'' (1590) describes the [[American black bear|black bear]], [[Eastern gray squirrel|gray squirrel]], hare, [[North American river otter|otter]], [[opossum]], [[raccoon]], [[skunk]], [[Virginia deer|Virginia]] and [[mule deer]], [[turkey (bird)|turkeys]], and [[horseshoe crab]] (''Limulus'').
*1589. [[José de Acosta]] (Spanish, 1539–1600) wrote ''((lang|la|De Natura Novi Orbis Libri duo))'' (1589) and ''((lang|es|Historia Natural y Moral de las Indias))'' (1590), describing many animals from the New World previously unknown to Europeans.

===17th century===
*1600. In Italy a spider scare lead to hysteria and the [[tarantella]] dance by which the body cures itself through physical exertions.
*1602. [[Ulisse Aldrovandi]] (Italian, 1522–1605) wrote ''((lang|la|De Animalibus Insectis))''. This and his other works include many scientific inaccuracies, but he used wing and leg morphology to construct his classification of insects. He is more highly regarded for his ornithological contributions.
*1604–1614. [[Francisco Hernández de Toledo]] (Spanish) was sent to study Mexican biota in 1593–1600, by [[Philip II of Spain]]. His notes were published in Mexico in 1604 and 1614, describing many animals to Europeans for the first time: [[coyote]], buffalo, [[axolotl]], [[porcupine]], [[Pronghorn|pronghorn antelope]], [[horned lizard]], [[bison]], [[peccary]], and the [[toucan]]. He also included figures of many animals for the first time, including the [[ocelot]], rattlesnake, manatee, alligator, armadillo, and pelican.
*1607 (1612?). [[Captain John Smith]] (English), head of the [[Jamestown, Virginia|Jamestown]] colony, wrote ''A Map of Virginia'' in which he describes the physical features of the country, its climate, plants and animals, and inhabitants. He describes the raccoon, [[muskrat]], [[flying squirrel]], and other animals.
*1617. [[Garcilaso de la Vega (chronicler)|Garcilaso de la Vega]] (Peruvian Spanish, 1539–1617) wrote ''Royal Commentaries of Peru'', containing descriptions of the [[condor]], [[ocelot]]s, [[Cougar|puma]], [[viscacha]], [[tapir]], [[rhea (bird)|rhea]], [[skunk]], [[llama]], [[huanaco]], [[paca]], and [[vicuña]].
*1620? North American colonists probably introduced the European honeybee, ''[[Apis mellifera]]'', into Virginia. By the 1640s these insects were also in [[Massachusetts]]. They became feral and advanced through eastern North America before the settlers.
*1628. [[William Harvey]] (English, 1578–1657) published ''((lang|la|Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus))'' (1628) with the doctrine of the circulation of blood (an inference made by him in about 1616).
*1634. William Wood (English) wrote ''New England Prospect'' (1634) in which he describes New England's fauna.
*1637. [[Thomas Morton (colonist)|Thomas Morton]] (English, c. 1579–1647) wrote ''New English Canaan'' (1637) with treatments of 26 species of mammals, 32 birds, 20 fishes and 8 marine invertebrates.

[[File:Historia-Naturalis-Brasiliae.jpg|thumb|Title plate of ''((lang|la|Historia Naturalis Brasiliae))'']]
*1648. [[Georg Marcgrave]] (1610–1644) was a German astronomer working for Johann Moritz, Count Maurice of Nassau, in the Dutch colony set up in northeastern [[Brazil]]. His ''((lang|la|Historia Naturalis Brasiliae))'' (1648) contains the best early descriptions of many Brazilian animals. Marcgrave used [[Tupian languages|Tupi]] names that were later Latinized by Linnaeus in the 13th edition of the ''[[Systema Naturae]]''. The biological and linguistic data could have come from Moraes, a Brazilian [[Jesuits|Jesuit]] priest turned apostate.
*1651. [[William Harvey]] published ''((lang|la|Exercitationes de Generatione Animalium))'' (1651) with the aphorism ''((lang|la|Ex ovo omnia))'' on the title page.
*1661. [[Marcello Malpighi]] (Italian, 1628–1694) discovered [[Capillary|capillaries]] (1661), structures predicted to exist by Harvey some thirty years earlier. Malpighi was the founder of [[Histology|microanatomy]]. He studied, among other things, the anatomy of the silkworm (1669) and the development of the chick (1672).
*1665. [[Robert Hooke]] (English, 1635–1703) wrote ''Micrographia'' (1665, 88 plates), with his early microscopic studies. He coined the term "[[Cell (biology)|cell]]".
*1668. Opening of the Royal Menagerie at [[Palace of Versailles]].
*1668. [[Francesco Redi]] (Italian, 1621–1697) wrote ''((lang|it|Esperienze Intorno alla Generazione degli Insetti))'' (1668) and ''((lang|la|De animaculis vivis quae in corpribus animalium vivorum reperiuntur))'' (1708). His refutation of spontaneous generation in flies is still considered a model in experimentation.
*1669. [[Jan Swammerdam]] (Dutch, 1637–1680) wrote ''((lang|la|Historia Insectorum Generalis))'' (1669) describing [[metamorphosis]] in insects and supporting the performation doctrine. He was a pioneer in microscopic studies. He gave the first description of [[Red blood cell|red blood corpuscles]] and discovered the valves of [[Lymphatic vessel|lymph vessels]]. His work was unknown and unacknowledged until after his death.
*1672. [[Regnier de Graaf]] (Dutch, 1641–1673) reported that he had traced the [[Egg cell|human egg]] from the [[ovary]] down the [[fallopian tube]] to the [[uterus]]. What he really saw was the [[Ovarian follicle|follicle]].
*1675–1722. [[Antonie van Leeuwenhoek]] (Dutch, 1632–1723) wrote ''((lang|la|Arcana Naturae Detectae Ope Microscopiorum Delphis Batavorum))'', a treatise with early observations made with microscopes. He discovered blood corpuscles, [[Striated muscle tissue|striated muscles]], [[Sperm|human spermatozoa]] (1677), [[protozoa]] (1674), [[bacteria]] (1683), [[rotifer]]s, etc.
*[[Martin Lister]] (English, 1639–1712) publishes the first work on spiders based on observation.
*1691. [[John Ray]] (English, 1627–1705) wrote ''((lang|la|Synopsis methodica animalium quadripedum))'' (1693), ''((lang|la|Historia Insectorum))'' (1710), and ''The Wisdom of God Manifested in the Works of the Creation'' (1691). He tried to classify different animal species into groups largely according to their [[toe]]s and [[Tooth|teeth]].
*1699. [[Edward Tyson]] (English, 1650–1708) wrote ''((lang|la|Orang-Outang sive Homo Sylvestris))'' (or ''Anatomy of a Pygmie Compared with that of a Monkey, an Ape and a Man'') (1699), his anatomical study of the [[primate]]. This was the first detailed and accurate study of the higher apes. Other studies by Tyson include the female [[porpoise]], male [[rattlesnake]], [[tapeworm]], [[roundworm]] (''Ascaris''), [[peccary]] and [[opossum]].
*1700. [[Félix de Azara]] (Spanish) estimated the feral herds of cattle on the South American [[pampas]] at 48 million animals. These animals probably descended from herds introduced by the Jesuits some 100 years earlier. (North America and Australia were to follow in this pattern, where feral herds of cattle and [[mustang]]s would explode, become pests, and reform the frontier areas.)

===18th century===
[[File:Guavenzweig.jpg|thumb|Ants, spiders and hummingbird. Plate from ''((lang|la|Metamorphosis insectorum surinamensis))'']]
*1705. [[Maria Sybilla Merian]] (German, 1647–1717) wrote and illustrated her ''((lang|la|Metamorphosis insectorum surinamensis))'' (''((lang|nl|Veranderingen der Surinaamsche Insecten))'') (1705). In this book she stated that ''[[Fulgora lanternaria]]'' was luminous.
*1734–1742. [[René Antoine Ferchault de Réaumur]] (French, 1683–1756) was an early entomologist. His ''((lang|fr|Mémoires pour servir ... l'histoire des insectes))'' (6 volumes) shows the best of zoological observation at the time. He invented the glass-fronted bee hive.
*1740. [[Abraham Trembley]], Swiss naturalist, discovered the [[hydra (genus)|hydra]] which he considered to combine both animal and plant characteristics. His ''((lang|fr|Mémoires pour Servir ... l'Histoire d'un Genre de Polypes d'Eau Douce ... Bras en Terme de Cornes))'' (1744) showed that freshwater polyps of ''Hydra'' could be sectioned or mutilated and still reform. [[Regeneration (biology)|Regeneration]] soon became a topic of inquiry among Réaumur, Bonnet, [[Lazzaro Spallanzani|Spallanzani]], and others.
*1745. [[Charles Bonnet]] (French-Swiss, 1720–1793) wrote ''((lang|fr|Traité d'Insectologie))'' (1745) and ''((lang|fr|Contemplation de la nature))'' (1732). He confirmed [[parthenogenesis]] of [[aphid]]s.
*1745. [[Pierre Louis Maupertuis|Pierre Louis M. de Maupertuis]] (French, 1698–1759) went to [[Lapland (Finland)|Lapland]] to measure the [[arc of the meridian]] (1736–1737). Maupertuis was a Newtonian. He generated family trees for inheritable characteristics (e.g., [[haemophilia]] in European royal families) and showed inheritance through both the male and female lines. He was an early evolutionist and head of the [[Prussian Academy of Sciences|Berlin Academy of Sciences]]. In 1744 he proposed the theory that molecules from all parts of the body were gathered into the [[gonad]]s (later called "[[pangenesis]]"). ''((lang|fr|Vénus physique))'' was published anonymously in 1745. Maupertuis wrote ''((lang|fr|Essai de cosmologie))'' in which he suggests a [[survival of the fittest]] concept: "Could not one say that since, in the accidental combination of Nature's productions, only those could survive which found themselves provided with certain appropriate relationships, it is no wonder that these relationships are present in all the species that actually exist? These species which we see today are only the smallest part of those which a blind destiny produced."
*1748. [[John Needham|John Tuberville Needham]], an English naturalist, wrote ''Observations upon the Generation, Composition, and Decomposition of Animal and Vegetable Substances'' in which he offers "proof" of spontaneous generation. Needham found flasks of broth teeming with "little animals" after having boiled them and sealed them, but his experimental techniques were faulty.
[[File:GLBuffon.jpg|thumb|Statue of Buffon in the ''((lang|fr|[[Jardin des Plantes]]))'' in Paris.]]
*1749–1804. [[Georges-Louis Leclerc, Comte de Buffon]] (French, 1707–1788) wrote ''((lang|fr|Histoire Naturelle))'' (1749–1804 in 44 vols.), which asserted that species were mutable. Buffon also drew attention to [[Vestigiality|vestigial organs]]. He held that spermatozoa were "living organic molecules" that multiplied in the semen.
*1752. Founding of the [[Schönbrunn Zoo]] in [[Vienna]], the world's oldest continuously operating zoo.
*1753. The [[British Museum]] was founded in the will of  Sir [[Hans Sloane]] (English (born Ireland), 1660–1753).  It would open its doors in 1759.
*1758. [[Albrecht von Haller]] (Swiss, 1708–1777) was one of the founders of modern [[physiology]]. His work on the [[nervous system]] was revolutionary. He championed animal physiology, along with human physiology. See his textbook ''((lang|la|Elementa Physiologiae Corporis Humani))'' (1758).
*1758. [[Carl Linnaeus]] (Swedish, 1707–1778) published the ''((lang|la|[[Systema Naturae]]))'' whose [[10th edition of Systema Naturae|tenth edition]] (1758) is the starting point of [[binomial nomenclature]] for zoology.
*1759. [[Caspar Friedrich Wolff]] (1733–1794) wrote ''((lang|la|Theoria Generationis))'' (1759) that disagreed with the idea of [[Preformationism|preformation]]. He supported the doctrine of [[epigenesis (biology)|epigenesis]] as a way to resolve the problem of hybrids (mule, hinny, apemen) in preformation.

[[File:Karte Cook Seereise nr1.png|thumb|Route of the [[First voyage of James Cook]]]]
*1769. [[Edward Bancroft]] (English) wrote ''An Essay on the Natural History of Guyana in South America'' (1769)<ref>((Cite book |last=Bancroft |first=Edward |url=https://books.google.com/books?id=iWEBAAAAQAAJ&dq=An+Essay+on+the+Natural+History+of+Guyana+in+South+America&pg=PR4 |title=An Essay on the Natural History of Guiana, in South America: Containing a Description of Many Curious Productions in the Animal and Vegetable Systems of that Country. Together with an Account of the Religion, Manners, and Customs of Several Tribes of Its Indian Inhabitants. Interspersed with a Variety of Literary and Medical Observations |date=1769 |publisher=T. Becket and P.A. De Hondt |language=en))</ref> and advanced the theory that flies transmit disease.
*1771. [[Johann Reinhold Forster]] (German, 1729–1798) was the naturalist on Cook's second voyage around the world (1772–1775). He published a ''Catalogue of the Animals of North America'' (1771)<ref>((Cite book |last=Forster |first=Johann Reinhold |url=https://books.google.com/books?id=H4c-AAAAcAAJ&dq=Catalogue+of+the+Animals+of+North+America&pg=PA1 |title=A catalogue of the animals of North America. To which are added short directions for collecting, preserving and transporting all kinds of natural history curiosities |date=1771 |publisher=B. White |language=en))</ref> as an addendum to Kalm's ''Travels''. He also studied the birds of [[Hudson Bay]].
*1774. [[Gilbert White]] (English) wrote ''[[The Natural History of Selborne|The natural history and antiquities of Selborne, in the county of Southampton]]'' (1774) with fine ornithological observations on [[Animal migration|migration]], [[Territory (animal)|territoriality]], and [[Flocking (behavior)|flocking]].
*1774. [[European lancelet]] is described.
*1775. [[Johan Christian Fabricius]] (Danish, 1745–1808) wrote ''((lang|la|Systema Entomologiae))'' (1775), ''((lang|la|Genera Insectorum))'' (1776), ''((lang|la|Philosophia Entomologica))'' (1778), ''((lang|la|Entomologia Systematica))'' (1792–1794, in six vols.), and later publications (to 1805), to make Fabricius one of the world's greatest entomologists.
*1780. [[Lazaro Spallanzani]] (Italian, 1729–1799) performed [[In vitro fertilisation|artificial fertilization]] in the frog, silkmoth and dog. He concluded from filtration experiments that spermatozoa were necessary for fertilization. In 1783 he showed that human [[digestion]] was a [[chemical process]] since [[Gastric acid|gastric juices]] in and outside the body liquefied food (meat). He used himself as the experimental animal. His work to disprove spontaneous generation in microbes was resisted by [[John Needham]] (English priest, 1713–1781).
*1780. [[Antoine Lavoisier]] (French, 1743–1794) and [[Pierre Laplace]] (French, 1749–1827) wrote ''Memoir on heat''.<ref>((Cite book |last1=Lavoisier |first1=Antoine Laurent |url=https://books.google.com/books?id=G0IBuAAACAAJ |title=Memoir on Heat: Read to the Royal Academy of Sciences, 28 June 1783 |last2=Laplace |first2=Pierre Simon de |date=1982 |publisher=Neale Watson Acad. Publ. |language=en))</ref> Lavoisier, the discoverer of [[oxygen]], concluded that animal [[Respiration (physiology)|respiration]] was a form of [[combustion]].

[[File:Eulemur mongoz Schreber.jpg|thumb|''[[Eulemur mongoz]]'', plate from Johann Schreber's ''((lang|fr|Histoire naturelle des quadrupèdes représentés d´après nature))'']]
*1783–1792. [[Alexandre Rodrigues Ferreira]] (Brazilian) wrote ''((lang|pt|Viagem Filosófica pelas Captanias do Grão-Pará, Rio Negro, Mato Grosso e Cuiabá))''. His specimens were taken by [[Étienne Geoffroy Saint-Hilaire|Saint-Hilaire]] from [[Lisbon]] to the [[National Museum of Natural History, France|Paris Museum]] during the Napoleonic invasion of Portugal.
*1784. [[Johann Wolfgang von Goethe]] (German) wrote ''((lang|de|Erster Entwurf einer Einleitung in die vergleichende Anatomie))'' (1795) that promoted the idea of archetypes to which animals should be compared.
*1784. [[Thomas Jefferson]] (American) wrote ''Notes on the State of Virginia'' (1784) that refuted some of Buffon's mistakes about New World fauna. As U.S. president, he dispatched the [[Lewis and Clark Expedition]] to the American West (1804).
*1788. The [[First Fleet]] inaugurates British settlement of [[Australia]]. Knowledge of Australia's unique zoology, including [[marsupial]]s and the [[platypus]], would revolutionize Western zoology.
*1789? [[Guillaume Antoine Olivier]] (French, 1756–1814) wrote ''((lang|fr|Entomologie))'', or ''((lang|fr|Histoire Naturelle des Insectes))'' (1789).
*1789. [[George Shaw (biologist)|George Shaw]] & [[Frederick Polydore Nodder]] published ''The Naturalist's Miscellany: or coloured figures of natural objects drawn and described immediately from nature'' (1789–1813) in 24 volumes with hundreds of color plates.
*1792. [[François Huber]] made original observations on honeybees. In his ''((lang|fr|Nouvelles Observations sur les Abeilles))'' (1792) he noted that the first eggs laid by [[queen bee]]s develop into [[Drone (bee)|drones]] if her [[nuptial flight]] had been delayed and that her last eggs would also give rise to drones. He also noted that rare worker eggs develop into drones. This anticipated by over 50 years the discovery by [[Jan Dzierżon]] that drones come from unfertilized eggs and queen and worker bees come from fertilized eggs.
*1793. The [[National Museum of Natural History, France]] is founded in Paris. It became a major center of zoological research in the early nineteenth century.
*1793. [[Lazaro Spallanzani]] (Italian, 1729–1799) conducted experiments on the orientation of [[bat]]s and [[owl]]s in the dark.
*1793. [[Christian Konrad Sprengel]] (1750–1816) wrote ''((lang|de|Das entdeckte Geheimniss der Natur im Bau und in der Befruchtung der Blumen))'' (1793) that was a major work on insect [[pollination]] of flowers, previously discovered in 1721 by [[Philip Miller]] (1694–1771), the head gardener at Chelsea and author of the famous ''[[Gardener's Dictionary]]'' (1731–1804).

[[File:Christian-Konrad-Sprengel 0118 a.jpg|thumb|Plaque commemorating Christian Konrad Sprengel]]
*1794. [[Erasmus Darwin]] (English, grandfather of [[Charles Darwin]]) wrote ''Zoönomia, or the Laws of Organic Life'' (1794)<ref>((Cite book |last=Darwin |first=Erasmus |url=https://books.google.com/books?id=6OhEAQAAMAAJ&q=Zo%C3%B6nomia,+or+the+Laws+of+Organic+Life |title=Zoonomia; Or, The Laws of Organic Life: In Three Parts : Complete in Two Volumes |date=1809 |publisher=Thomas & Andrews |language=en))</ref> in which he advanced the idea that environmental influences could transform species.
*1796–1829. [[Pierre André Latreille]] (French, 1762–1833) sought to provide a "natural" system for the classification of animals, in his many monographs on invertebrates. ''((lang|fr|Insectes de l'Amerique Equinoxiale))'' (1811) was devoted to insects collected by [[Alexander Humboldt|Humboldt]] and [[Aime Bonpland|Bonpland]].
*1797-1804. Publication of [[A History of British Birds]] by [[Thomas Bewick]] and [[Ralph Beilby]] in two volumes.
*1798. Publication of [[Thomas Robert Malthus]]'s [[An Essay on the Principle of Population]], a book important to both Darwin and Wallace.
*1799. [[George Shaw (biologist)|George Shaw]] (English) provided the first description of the duck-billed platypus.<ref>((Cite journal|last1=Shaw|first1=George|last2=Nodder|first2=Frederick Polydore|date=1799|title=The Duck-Billed Platypus, Platypus anatinus.|url=https://www.biodiversitylibrary.org/part/304567|journal=The Naturalist's Miscellany|volume=10|issue=CXVIII|pages=385–386|doi=10.5962/p.304567))</ref> [[Everard Home]] (1802) provided the first complete description.
*1799–1803. [[Alexander von Humboldt]] (German, 1769–1859) and [[Aimé Bonpland|Aimé Jacques Alexandre Goujaud Bonpland]] (French) arrived in Venezuela in 1799. Humboldt's ''Personal Narrative of Travels to the Equinoctial Regions of America during the years 1799–1804''<ref>((Cite book |last1=Humboldt |first1=Alexander von |url=https://books.google.com/books?id=dlYUAAAAYAAJ&dq=Personal+Narrative+of+Travels+to+the+Equinoctial+Regions+of+America+during+the+years+1799%E2%80%931803&pg=PA281 |title=Personal Narrative of Travels to the Equinoctial Regions of the New Continent, During the Years 1799-1804 |last2=Bonpland |first2=Aimé |date=1815 |publisher=M. Carey, no. 121 Chesnut street. Dec. 23. [Geo. Phillips, Printer, Carlisle.] |language=en))</ref> and ''Kosmos'' were influential in his time.
*1799. [[Georges Cuvier]] (French, 1769–1832) established [[comparative anatomy]] as a field. He also founded the science of [[paleontology]]. He wrote ''((lang|fr|Leçons d'Anatomie Comparée))'' (1801–1805), ''((lang|fr|Le Règne Animal distribué d'après son organisation))'' (1816), ''((lang|fr|Ossemens Fossiles))'' (1812–1813). He believed in the fixity of species and the [[Genesis flood narrative|Biblical Flood]]. His early ''((lang|fr|Tableau élémentaire de l'histoire naturelle des animaux))'' (1798) was influential, but it did not include Cuvier's major contributions to animal classification.
*1799. American hunters killed the last [[bison]] on the Eastern coast of the United States, in Pennsylvania.

===19th century===
[[File:Jean-baptiste lamarck2.jpg|thumb|Portrait of Jean-Baptiste Lamarck]]
*1802. [[Jean-Baptiste de Lamarck]] (French, 1744–1829) wrote ''((lang|fr|Recherches sur l'Organisation des Corps Vivants))'' and ''((lang|fr|Philosophie zoologique))'' (1809). He was an early evolutionist and organized invertebrate paleontology. While Lamarck's contributions to science include work in [[meteorology]], [[botany]], [[chemistry]], [[geology]], and paleontology, he is best known for his work in invertebrate zoology and his theoretical work on evolution. He published a seven-volume work, ''((lang|fr|Histoire naturelle des animaux sans vertèbres))'' ("Natural history of animals without backbones"; 1815–1822).
*1813–1818. [[William Charles Wells]] (Scottish-American, 1757–1817) was the first to recognise the principle of [[natural selection]]. He read a paper to the [[Royal Society]] in 1813 (but not published until 1818) which used the idea to explain differences between [[Race (human categorization)|human races]]. The application was limited to the question of how different skin colours arose.
*1815. [[William Kirby (entomologist)|William Kirby]] and [[William Spence (entomologist)|William Spence]] (English) wrote ''An Introduction to Entomology'' (first edition in 1815). This was the first modern entomology text.
*1817. Publication of ''American Entomology'' by [[Thomas Say]], the first work devoted to American insects. A greatly expanded three-volume edition would appear 1824–1828.  Say was a systematic zoologist who moved to the utopian community at [[New Harmony, Indiana]], in 1825. Most of his insect collections have been recovered.
*1817. [[Georges Cuvier]] wrote ''Le Règne Animal'' (Paris).
*1817–1820. [[Johann Baptist von Spix]] (German, 1781–1826) and [[Carl Friedrich Philipp von Martius]] (German) conducted Brazilian zoological and botanical explorations (1817–1820). See their ''((lang|de|Reise in Brasilien auf Befehl Sr. Majestät Maximilian Joseph I König von Bayern in den Jahren 1817 bis 1820 gemacht und beschrieben))'' (3 vols., 1823–1831).
*1817. [[William Smith (geologist)|William Smith]], in his ''Strategraphical System of Organized Fossils'' (1817) showed that certain strata have characteristic series of fossils.
*1819 [[William Lawrence (biologist)|William Lawrence]] (English, 1783–1867) published a book of his lectures to the [[Royal College of Surgeons]]. The book contains a rejection of [[Lamarckism]] ([[soft inheritance]]), proto-evolutionary ideas about the origin of mankind, and a denial of the 'Jewish scriptures' ([[Old Testament]]). He was forced to suppress the book after the Lord Chancellor refused copyright and other powerful men made threatening remarks.
*1819. [[Malayan tapir]], a first species of [[tapir]] to be discovered, is described.
*1824. Publication of the French physician [[Henri Dutrochet]]'s ''Mémoires pour servir a l'histoire anatomique et physiologique des végétaux et des animaux'' setting forth a physiological theory of the cell.
*1824. The Royal Society for the Prevention of Cruelty to Animals ([[RSPCA]]) is founded at London.
*1824. Founding of the [[Zoological Journal]], the first English-language journal of zoology. The last issue would appear in 1834.
*1825. [[Gideon Mantell]] (English) wrote "Notice on the ''[[Iguanodon]]'', a newly discovered fossil reptile, from the sandstone of Tilgate Forest, in Sussex" (Phil. Trans. Roy, Soc. Lond., 115: 179–186), the first paper on [[dinosaurs]]. The name dinosaur was coined by anatomist [[Richard Owen]].
*1826. Founding of the [[Zoological Society of London]].
*1826–1839. [[John James Audubon]] (Haitian-born American, 1785–1851) wrote ''Birds of America'' (1826–1839), with North American bird portraits and studies. See also his posthumously published volume on North American mammals written with his sons and the naturalist [[John Bachman]], ''The Viviparous Quadrupeds of North America'' (1845–1854) with 150 folio plates.
*1827. [[Karl Ernst von Baer]] (Russian embryologist, 1792–1876) was the founder of comparative embryology. He demonstrated the existence of the mammalian ovum, and he proposed the germ-layer theory. His major works include ''((lang|la|De ovi mammalium et hominis genesi))'' (1827) and ''((lang|de|Über Entwickelungsgeschichte der Tiere))'' (1828; 1837).
*1827. Description of [[Sagitta (arrowworm)|Sagitta]], a genus of [[chaetognaths]].
*1828. The Zoological Society of London opens its "zoo" to the public (later known as the [[London Zoo]]) for two days a week beginning April 27, 1828, with the first [[hippopotamus]] to be seen in Europe since the ancient Romans showed one at the [[Colosseum]]. This was the first modern zoo founded for scientific research and education.
*1829. [[James Smithson]] (English, 1765–1829) donates seed money in his will for the founding of the [[Smithsonian Institution]] in [[Washington, D.C.|Washington]].
*1830–1833. Sir [[Charles Lyell]] (English, 1797–1875) writes ''[[Principles of Geology]]'' and described the time required for evolution to work. Darwin took this book to sea on [[HMS Beagle]].
*1830. [[Étienne Geoffroy Saint-Hilaire]] (French, 1772–1844) writes ''((lang|la|Principes de philosophie zoologique))'' (1830).
*1830. Founding of the [[Journal of Zoology]], then known as Proceedings of the Zoological Society of London.
*1831. Founding of the [[Magasin de Zoologie]], the first French-language zoological journal.
*1831–1836. [[Charles Darwin]] (English, 1809–1882) and Captain [[Robert FitzRoy]] (English) depart for their voyage. Darwin's report is generally known as ''[[The Voyage of the Beagle]]''.
*1832. [[Thomas Nuttall]] (1786–1859) writes ''A Manual of the Ornithology of the United States and Canada'' (1832) that becomes the standard text on the subject for most of the 19th century.
[[File:HMS Beagle by Conrad Martens.jpg|thumb|A watercolour of [[HMS Beagle|HMS ''Beagle'']]]]
*1835. [[William John Swainson|William Swainson]] (English, 1789–1855) writes ''A Treatise on the Geography and Classification of Animals'' (1835), in which he uses ad hoc [[land bridge]]s to explain animal distributions. He includes some second-hand observations on Old World [[army ant]]s.
*1835. Founding of the [[Archiv für Naturgeschichte]], the premier German-language journal of natural history with an emphasis on zoology.  It would be published until 1926.
*1839. [[Theodor Schwann]] (German, 1810–1882) writes ''((lang|de|Mikroskopischen Untersuchungen über die Übereinstimmungen in der Strucktur und dem Wachstum der Thiere und Pflanzen))'' (1839). Schwann established the foundation for [[cell theory]].
*1839. [[Louis Agassiz]] (Swiss-American, 1807–1873), an expert on fossil fishes, founds the Museum of Comparative Zoology at Harvard University, and becomes Darwin's North American opposition. He was a popularizer of natural history. His ''((lang|la|Nomenclator Zoologicus))'' (1842–1847) was a pioneering effort.
*1840. [[Jan Evangelista Purkyně]], a Czech physiologist in [[Wrocław]] proposes that the word "protoplasm" be applied to the formative material of young animal embryos.
[[File:Dictionnaire universel Orbigny.jpg|thumb|1842 Plate from ''((lang|la|Dictionnaire universel d'histoire naturelle))'' by [[Charles d'Orbigny]]]]
*1842. Baron [[Justus von Liebig]] writes ''((lang|de|Die Thierchemie))'' in which he suggests that animal heat is produced by combustion, and founds the science of [[biochemistry]].
*1843. [[John James Audubon]], age 58, ascends the [[Missouri River]] to Fort Union at the mouth of the Yellowstone to sketch wild animals.
*1844. [[Berlin Zoo]] is founded.
*1844. [[Robert Chambers (journalist)|Robert Chambers]] (Scottish, 1802–1871) writes the ''[[Vestiges of the Natural History of Creation]]'' (1844) in which he includes early evolutionary considerations. This book, anonymously published, has a profound effect on Alfred Russel Wallace.
*1845. [[Karl Theodor Ernst von Siebold|von Siebold]] recognizes [[Protozoa]] as single-celled animals.
*1848. [[Josiah C. Nott]] (American), a physician from [[New Orleans]], publishes his belief that [[mosquito]]es transmit [[malaria]].
*1848. [[Alfred Russel Wallace]] (British, 1823–1913) and [[Henry W. Bates]] (English, 1825–1892) arrive in the [[Amazon River|Amazon River valley]] in 1848. Bates stays until 1859, exploring the upper Amazon. Wallace remains in the Amazon until 1852, exploring the [[Rio Negro (Amazon)|Rio Negro]]. Wallace writes ''A Narrative of Travels on the Amazon and Rio Negro'' (1853), and Bates writes ''The Naturalist on the River Amazons'' (1863). Later (1854–1862), Wallace travels to the Far East, as he reports in ''[[The Malay Archipelago]]'' (1869).
*1849. [[Arnold Adolph Berthold]] demonstrates by [[castration]] and testicular transplant that the [[Testicle|testis]] produces a blood-borne substance promoting male [[Secondary sex characteristic|secondary sexual characteristics]].
*1850. [[Thomas Hardwicke]] (British naturalist) is the first European to discover the [[lesser panda]] (''Ailurus fulgens'') in northern India.
*1855. [[Alfred Russel Wallace]] (English, 1823–1913) publishes ''On the law which has regulated the introduction of new species'' (Ann. Mag. Nat. Hist., September 1855), with evolutionary ideas that drew upon Wallace's experiences in the Amazon.
*1857–1881. [[Henri Milne-Edwards]] (French, 1800–1885) introduces the idea of physiologic division of labor and writes a treatise on comparative anatomy and physiology (1857–1881).

[[File:Charles Darwin seated.jpg|thumb|[[Charles Darwin]]'s 1859 publication ''[[On the Origin of Species]]'' revolutionised zoology.]]
*1859. [[Charles Darwin]] publishes ''[[On the Origin of Species]]'', explaining the mechanism of [[evolution]] by [[natural selection]] and founding the field of [[evolutionary biology]].
* Founding of [[Copenhagen Zoo]].
* 1864. [[Louis Pasteur]] disproves the spontaneous generation of cellular life.
* 1864. Founding of the [[Moscow Zoo]].
* 1865. [[Gregor Mendel]] demonstrates in [[Pea|pea plants]] that inheritance follows [[Mendelian Inheritance|definite rules]]. The Principle of Segregation states that each organism has two [[gene]]s per trait, which segregate when the organism makes eggs or sperm. The Principle of Independent Assortment states that each gene in a pair is distributed independently during the formation of eggs or sperm. Mendel's observations went largely unnoticed.
* 1868. Founding of the [[Lincoln Park Zoo]] in [[Chicago|Chicago, Illinois.]]
* 1869. [[Friedrich Miescher]] discovers [[nucleic acid]]s in the [[cell nucleus|nuclei]] of cells.
* 1872. Darwin publishes [[The Expression of the Emotions in Man and Animals]].
* 1873. Founding of the [[Cincinnati Zoo]].
* 1876. [[Oskar Hertwig]] and [[Hermann Fol]] independently describe (in [[sea urchin]] eggs) the entry of sperm into the egg and the subsequent fusion of the egg and sperm nuclei to form a single new nucleus.
* 1876. Founding of the [[Société zoologique de France]].
* 1878. Founding of the Zoological Society of Japan.
* 1881. [[Przewalski's horse]] is described.
* 1885. [[Polypodium hydriforme]], an unusual [[cnidarian]], is described.
* 1889. Founding of the [[National Zoological Park (United States)]] as part of the Smithsonian Institution in Washington, D.C.
* 1889. The first species of [[marsupial mole]] is described.
* 1892. [[Hans Driesch]] separates the individual cells of a 2-cell sea urchin embryo, and shows that each cell develops into a complete individual, thus disproving the theory of preformation, and demonstrating that each cell is "totipotent," containing all the hereditary information necessary to form an individual.
* 1895. Founding of the [[International Commission on Zoological Nomenclature]], the body which continues to govern zoological [[nomenclature]].
* 1899. Founding of the [[Bronx Zoo]].
* 1900. Three biologists, [[Hugo de Vries]], [[Carl Correns]], [[Erich von Tschermak]], independently rediscover Mendel's paper on heredity.<ref>((Cite journal |last=Lenay |first=Charles |date=Dec 2000 |title=Hugo De Vries: from the theory of intracellular pangenesis to the rediscovery of Mendel |url=https://doi.org/10.1016/S0764-4469(00)01250-6 |journal=Comptes Rendus de l'Académie des Sciences, Série III |volume=323 |issue=12 |pages=1053–1060 |doi=10.1016/S0764-4469(00)01250-6 |pmid=11147091 |via=Elsevier))</ref>
* 1900. Founding of the [[Unione Zoologica Italiana]].
* 1900. First species of [[Siboglinidae]] discovered.

===20th century===

====1901–1950====
* 1901. [[Okapi]] is described for science.
* 1905. [[William Bateson]] coins the term "[[genetics]]" to describe the study of biological inheritance.<ref>((Cite journal |last=Bateson |first=Patrick |date=2002 |title=William Bateson: a biologist ahead of his time |url=https://link.springer.com/article/10.1007/BF02715900 |journal=Journal of Genetics |volume=81 |issue=2 |pages=49–58 |doi=10.1007/BF02715900 |pmid=12532036 |s2cid=26806110 |via=Springer Link))</ref>
* 1906. Founding of the [[Beijing Zoo]].
* 1907. [[Ivan Pavlov]] demonstrates [[Classical conditioning|conditioned responses]] with salivating [[dog]]s.
* 1907. First species of [[protura]]ns are described.
* 1910. Founding of the [[Saint Louis Zoo]].
* 1914. [[Insect]] suborder [[Grylloblattodea]] is discovered.
* 1916. Founding of the [[San Diego Zoo]].
* 1916. Founding of the [[Zoological Survey of India]].
* 1922. [[Aleksandr Oparin]] proposes that the Earth's early atmosphere contained [[methane]], [[ammonia]], [[hydrogen]], and [[Water vapor|water vapour]], and that these were the raw materials for the [[origin of life]].
* 1931. Founding of [[Prague Zoo]].
* 1932. Founding of the [[Journal of Animal Ecology]].
* 1932. Establishment of the Bureau of Animal Population at the [[University of Oxford]]. 
* 1934. [[Brookfield Zoo]] is founded in [[Brookfield, Illinois]], a suburb of Chicago.
* 1935. [[Konrad Lorenz]] describes the [[imprinting (psychology)|imprinting]] behavior of young [[bird]]s.<ref>((Cite journal |last=Lorenz |first=Konrad |date=1937 |title=The Companion in the Bird's World |url=https://doi.org/10.2307/4078077 |journal=The Auk |volume=54 |issue=3 |pages=245–273 |doi=10.2307/4078077 |jstor=4078077 |via=JSTOR))</ref>
* 1936. Founding of the [[National Zoological Gardens of Sri Lanka]].
* 1937. In ''Genetics and the Origin of Species'', [[Theodosius Dobzhansky]] applies the chromosome theory and [[population genetics]] to natural populations in the first mature work of neo-Darwinism, also called the [[Modern synthesis (20th century)|modern synthesis]], a term coined by [[Julian Huxley]].

[[File:Latimeria chalumnae01.jpg|thumb|right|Prior to the discovery of a living example in 1938, [[coelacanth]]s were thought to have been extinct for 65 million years.]]
* 1938. A living [[coelacanth]] is found off the coast of southern [[Africa]].
* 1940. [[Donald Griffin]] and [[Robert Galambos]] announce their discovery of [[Animal echolocation|echolocation]] by [[bat]]s.<ref>((Cite journal |last=Griffin1 Galambos2 |date=1941 |title=The sensory basis of obstacle avoidance by flying bats. |url=https://doi.org/10.1002/jez.1400860310 |journal=Journal of Experimental Zoology |volume=86 |issue=3 |pages=481–506 |doi=10.1002/jez.1400860310 |via=Wiley))</ref>

====1951–2000====
* 1952. American [[Developmental biology|developmental biologists]] [[Robert Briggs (scientist)|Robert Briggs]] and [[Thomas Joseph King|Thomas King]] [[Cloning|clone]] the first vertebrate by transplanting nuclei from [[leopard frog]] embryos into enucleated eggs.
* 1952. [[Monoplacophora]]ns, so far considered extinct, are found to be still present today.
* 1955. First species from [[crustacean]] class [[Cephalocarida]] is discovered.
* 1956. First [[gnathostomulid]]s, a group of animals currently ranked as a [[phylum]], are described.
* 1959. Founding of the [[National Zoological Park Delhi]] in [[New Delhi]], India.
* 1960. [[Jane Goodall]] begins her [[chimpanzee]] research.
* 1961. [[Joan Oró]] discovers that concentrated solutions of [[ammonium cyanide]] in water can produce the [[nucleotide]] [[adenine]], a discovery that opened the way for new theories on the [[origin of life]].
* 1963. Founding of the [[National Zoo of Malaysia]] in [[Selangor]].
* 1963. Premier of the popular American zoological documentary series [[Wild Kingdom]] on the NBC television network. 140 episodes would appear before the series ended in 1988.
* 1964. The [[International Union for Conservation of Nature]] (IUCN) issues its first [[IUCN Red List]] of species threatened by [[extinction]].
* 1967. [[John Gurdon]] used nuclear transplantation to [[cloning|clone]] an African [[clawed frog]]; first cloning of a [[vertebrate]] using a nucleus from a fully [[Cellular differentiation|differentiated]] adult cell.
* 1972. [[Stephen Jay Gould]] and [[Niles Eldredge]] propose "[[punctuated equilibrium]]," a theory which states that the fossil record is an accurate depiction of the pace of evolution, with long periods of "stasis" (little change) punctuated by brief periods of rapid change and species [[Divergent evolution|divergence]].
* 1973. Passage of the U. S. [[Endangered Species Act of 1973]].
* 1977. [[Riftia pachyptila]], the giant tube worm, discovered.
* 1980. Founding of PETA, [[People for the Ethical Treatment of Animals]].
* 1980. [[Lobatocerebridae]], a group of simple, unsegmented [[annelid]]s with relatively complex [[brain]], are described.<ref>Alexandra Kerbl, Nicolas Bekkouche, Wolfgang Sterrer & Katrine Worsaae, "Detailed reconstruction of the nervous and muscular system of Lobatocerebridae with an evaluation of its annelid affinity", BMC Evolutionary Biology volume 15, Article number: 277 (2015), https://bmcecolevol.biomedcentral.com/articles/10.1186/s12862-015-0531-x</ref>
* 1981. The first extant members of [[remipedia|remipedes]], a new class of [[crustacean]]s, are discovered.
* 1983. A new class of [[crustacean]]s, [[Tantulocarida]], is proposed.
* 1983. First species of [[loricifera]]ns are described.
* 1985. The primatologist [[Dian Fossey]] is murdered by poachers.
* 1986. [[Sea daisies]], a group of unusual [[starfish]]es, are discovered.
* 1990. American entomologist [[E. O. Wilson]] and German entomologist [[Bert Hölldobler]] publish [[The Ants]]. The next year it will win the [[Pulitzer Prize]] for non-fiction, the only zoology textbook ever to do so.
* 1992. [[Saola]], a new species of [[ungulate]], is discovered in [[Vietnam]].
* 1995. [[Symbion pandora]], the first known species from the [[phylum]] [[Cycliophora]], is described by [[Reinhardt Kristensen]] and [[Peter Funch]].
* 1996. [[Dolly the sheep]] is the first adult mammal to be successfully cloned.
* 1999. [[Indonesian coelacanth]], the second species of [[coelacanth]], is described.
* 2000. [[Reinhardt Kristensen]] and [[Peter Funch]] describe [[Limnognathia maerski]], the first known species from the [[animal]] [[phylum]] [[Micrognathozoa]].
* 2000. [[Kikiki huna]], the smallest known flying [[insect]], is described.

===21st century===

* 2002. First species from [[insect]] suborder [[Mantophasmatodea]] are described.
* 2003. [[Tiburonia]] granrojo, known also as Big Red Jellyfish, a [[deep-sea]] species of jellyfish, is described.
* 2004. [[Osedax]], known also as bone-eating worm, a deep-sea species of [[Siboglinidae]] that feeds on bones of [[whale]] carcasses, is described.
* 2005. [[Mimic octopus]] is described.
* 2005. [[Malo maxima]], a very venomous species of [[cubozoa]]n, is described.
* 2006. [[Chondrocladia|Ping-pong Tree Sponge]], an unusual species of carnivorous [[sponge]], is described.
* 2006. [[Wunderpus photogenicus|Wunderpus]] is described.
* 2007. [[Malo kingi]], a tiny, but very venomous species of [[cubozoa]]n, is described.
* 2011. [[Halicephalobus mephisto]], a species of [[nematode]] living 3.6&nbsp;km under the surface of Earth in gold mines in [[South Africa]], is discovered.
* 2011. [[Bonaire banded box jellyfish]], a species of [[cubozoa]]n, is described.
* 2012. [[Chondrocladia lyra]], an unusual species of carnivorous [[sponge]], is described.
* 2013. [[Edwardsiella andrillae]], an unusual species of [[sea anemone]] that lives attached to sea ice, is described.
* 2016. [[Scolopendra cataracta]], the first known species of amphibious [[centipede]], is described.
* 2016. Four new species from subphylum [[Xenoturbellida]] are described. Only a single species from [[Xenoturbellida]] ([[Xenoturbella bocki]]) was known before. 
* 2017. [[Tapanuli orangutan]] is found to be a distinct species.
* 2017. [[Mariana snailfish]], a [[deep-sea]] species of fish, is described.
* 2018. [[Hoilungia|Hoilungia hongkongensis]] is described, the first species of [[placozoa]]n to be discovered since 1883.
* 2019. [[Polyplacotoma mediterranea]] is described, the first species from the [[placozoa]]n class [[Polyplacotomia]].
* 2021. [[Eumillipes persephone]], a species of [[millipede]] with up to 1,306 [[leg]]s, is discovered, the first [[myriapod]] known to have more than 1,000 legs.

==See also==

* [[Timeline of biology and organic chemistry]]
* [[List of megafauna discovered in modern times]]
* [[International Institute for Species Exploration]]
* [[Monterey Bay Aquarium Research Institute]]
* [[Lazarus taxon]]

==References==
((reflist|30em))

==External links==
*[http://highered.mcgraw-hill.com/sites/0072349034/student_view0/zoology_timeline.html Mc-Graw Hill]
*[http://www.eti.uva.nl/support/files/mac/velten.pdf Wonders of Nature in the Menagerie of Blauw Jan in Amsterdam, as observed by Jan Velten around 1700]((Dead link|date=July 2018 |bot=InternetArchiveBot |fix-attempted=no ))
*[http://christopherplumb.files.wordpress.com/2011/05/plumbthesis2010.pdf Exotic Animals in Eighteenth-Century Britain]
*[http://gdz.sub.uni-goettingen.de/ Zoologica] [[Göttingen State and University Library]]

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((DEFAULTSORT:Timeline Of Zoology))
[[Category:Zoology timelines| ]]
[[Category:History of zoology]]

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