The sexes are similar except for the sex brands. The upper side is dark brown and lighter towards the margins. The sub-marginal spots vary greatly, although the spots on the inner band are always larger than those on the outer band of the hindwing. The background colour of its underside is uniform and the sub-marginal spots are more distinct than those seen on the upper surface. Usually, the spots at the forewing apex are arranged in an arc. Both wings have a white spot on each cell. The male has a sex brand on the upper surface of its forewing in interspace 1b, resembling a single light-coloured narrow streak on both sides of the wing. Females also have this demarcation on the underside, even though they do not actually have a sex brand.
Like other Danaids, the Common Crow’s flight is moderately fast and males congregate at plants which provide toxins. This is a migratory species
Habitats and Distribution
This species is numerous in the dry zone and depend on open vegetation to feed and search for mates. They also gather in large numbers in gloomy forests during dry spells in the dry zone.
Larval Food Plants
28 species of plants in the country including Hemidesmus indicus, Ficus religiosa and Cryptolepis buchananii.