The Fork-tailed Drongo, Dicrurus adsimilis, also called the Common Drongo, African Drongo or Savanna Drongo, is a drongo, a type of small passerine bird of the Old World tropics. The species was earlier considered to cover Asia, but the Asian species is now called the Black Drongo (Dicrurus macrocercus). They are members of the family Dicruridae.

The Fork-tailed Drongo is a common and widespread resident breeder in Africa south of the Sahara. These insect-eating birds are usually found in open forests or bush. Two to four eggs are laid in a cup nest in a fork high in a tree.

These are aggressive and fearless birds, given their small size, and will attack much larger species, including birds of prey if their nest or young are threatened.

The male is mainly glossy black, although the wings are duller. It is large-headed and has the forked tail which gives the species its name. The female is similar but less glossy. The bill is black and heavy, and the eye is red.

The Fork-tailed Drongo is 25 cm long. It has short legs and sits very upright whilst perched prominently, like a shrike. It flycatches or take prey from the ground and is attracted to bush fires.

The call is a metallic strink-strink.

The subspecies D. a. modestus (Príncipe) together with D. a. coracinus and D. a. atactus (Bioko and mainland west and central Africa from Guinea east to western Kenya and south to Angola) is sometimes split as a separate species, the Príncipe Drongo or Velvet-mantled Drongo D. modestus, (Hartlaub, 1849). Sometimes this species is split further into Príncipe Drongo D. modestus and Velvet-mantled Drongo D. coracinus (including atactus).