Napeocles jucunda, the great blue hookwing, is a South American butterfly of the family Nymphalidae.

[5] They can usually be found high in the canopy, but sometimes they are also present on the lower foliage of trees and on humid cacao-groves on fallen fruits.

[6][7] The eggs and pupae are very similar to that of Siproeta stelenes, but the final instar larvae is characterized by a dark maroon basal color, with the thorax and abdomen flecked by numerous yellow specks.

These fairly large, wide-winged fine butterflies show a very hard projection on the hindmargins of the forewings, just below the tip, with a deep concavity below.

The basic color is black or dark brown, with a broad blue to intense white band crossing the middle of the forewings and hindwings.