Tree-nymph
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Nymphalidae
Genus:	Idea
Species:	I. lynceus
Binomial name
Idea lynceus (Drury, 1773)
Synonyms
Papilio lynceus Drury, [1773] Hestia reinwardti Moore, 1883

Idea lynceus, the tree-nymph (Malaysian giant tree-nymph),^[1] is a species of nymphalid butterfly in the Danainae subfamily. It is found in South East Asia.

The wingspan is about 135–165 mm.

The larvae feed on Aganosma corymbosa.

Subspecies

Listed alphabetically:^[2]

• I. l. favorinus Fruhstorfer, 1910
• I. l. fumata Fruhstorfer, 1897 (southern Borneo)
• I. l. lynceus (Malaysian giant tree-nymph)^[1](Burma, Thailand, Peninsular Malaya, Langkawi, Sumatra)
• I. l. niasica Fruhstorfer, 1903 (Nias)
• I. l. reinwardti Moore, 1883
• I. l. thalassica Fruhstorfer, 1910^[3]