Idea lynceus

Idea lynceus, the tree-nymph (Malaysian giant tree-nymph), 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:
 * I. l. favorinus Fruhstorfer, 1910
 * I. l. fumata Fruhstorfer, 1897 (southern Borneo)
 * I. l. lynceus (Malaysian giant tree-nymph) (Burma, Thailand, Peninsular Malaya, Langkawi, Sumatra)
 * I. l. niasica Fruhstorfer, 1903 (Nias)
 * I. l. reinwardti Moore, 1883
 * I. l. thalassica Fruhstorfer, 1910