The Great Eggfly (Hypolimnas bolina), also called the Blue Moon Butterfly in New Zealand or Common Eggfly, is a species of nymphalid butterfly.
Hypolimnas bolina is a black-bodied butterfly with a wingspan of about 70–85 millimetres (2.8–3.3 in). The species has a high degree of sexual dimorphism. The female is mimetic with multiple morphs.
The upper side of the wings of the female is a brownish black and does not have any spots like those of the male. The edges bear white markings which are similar to those of the Common Indian Crow.
Featured in GEMS on January 23/2011