v t e Animal cognition
Cognition	Animal communication Animal consciousness Animal language Cognitive bias in animals Cognitive ethology Comparative cognition Emotion in animals Insect Mirror test Neuroethology Observational learning Primate archaeology Tool use by non-humans sea otters Vocal learning
Intelligence	Bird Pigeon talking Cat Cephalopod Cetacean Dog Elephant Fish Primate Hominid Swarm
Pain	Pain in amphibians Pain in animals Pain in cephalopods Pain in crustaceans Pain in fish Pain in invertebrates
Relation to brain	Brain size Brain-to-body mass ratio Encephalization quotient Neuroscience and intelligence Number of neurons
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