Common insect flies all over the island throughout the year. Plentiful in dry zone and scarce in higher hills. It take part in migrations. Brown King Crow's food plant in larval stage is Kota-dimbula (Ficus hispida) of family Moraceae and probably of other ficus (Nuga) species. Brown King Crow is mimicked by female of the Great Eggfly, both sexes of Common Palmfly and Common mime.