The drongos are a family, Dicruridae, of passerine birds of the Old World tropics. The 29 species in the family are placed in a single genus Dicrurus. The drongo fantail (Chaetorhynchus papuensis), formerly named the pygmy drongo, is not closely related and is now placed in the family Rhipiduridae. Drongos are mostly black or dark grey, short-legged birds, with an upright stance when perched. They have forked tails and some have elaborate tail decorations. They feed on insects which they catch in flight or on the ground. Some species are accomplished mimics and have a variety of alarm calls, to which other birds and animals often respond. There is evidence that they utter hoax alarm calls that typically scare other animals off food, which the drongo then eats, a matter of interest to researchers.