Black drongo

black drongo  is a small Asian passerine bird of thedrongo family Dicruridae. It is a common resident breeder in much of tropical southernAsia from southwest Iran through India and Sri Lanka east to southern China andIndonesia. It is a wholly black bird with a distinctive forked tail and measures 28 cm  in length. Feeding on insects, it is common in open agricultural areas and light forest throughout its range, perching conspicuously on a bare perch or along power or telephone lines. The species is known for its aggressive behaviour towards much larger birds, such as crows, never hesitating to dive-bomb any bird of prey that invades its territory. This behaviour earns it the informal name of king crow. Smaller birds often nest in the well-guarded vicinity of a nesting black drongo. Previously considered a subspecies of the African fork-tailed drongo , it is now recognized as a full species.