The drongos are a family of small passerine birds of the Old World tropics, the Dicruridae. This family was sometimes much enlarged to include a number of largely Australasian groups, such as the Australasian fantails, monarchs and paradise flycatchers. The name is originally from the indigenous language of Madagascar, where it refers to local species, but is now used to refer to all members of the family.

These insectivorous birds are usually found in open forests or bush. Most are black or dark grey in colour, sometimes with metallic tints. They have long forked tails; some Asian species have elaborate tail decorations. They have short legs and sit very upright whilst perched, like a shrike. They flycatch or take prey from the ground. Some drongos, especially the greater racket-tailed drongo, are noted for their ability to mimic other birds and even mammals.

The word drongo is used in Australia as a mild form of insult tantamount to the term "idiot". This term derives from a racehorse in the 1920s that did not win in 47 starts.

Several species of animals and birds respond to drongos' alarm calls, which often warn of the presence of a predator. Fork-tailed or common drongos in the Kalahari desert are known to use alarm calls in the absence of a predator to cause animals to flee and abandon food, which they eat, getting up to 23% of their food this way. They not only use their own alarm calls, but imitate those of many species, either their victim's or that of another species that the victim responds to. If the call of one species is not effective, perhaps because of habituation, the drongo will try another; 51 different calls are known to be imitated. In one test on pied babblers, the babbler ignored an alarm call repeated three times when there was no danger, but continued to respond to different calls. Researchers have considered the possibility that these drongos possess theory of mind, not fully shown in any animal other than humans, but doubt this capability.

Genus Dicrurus
Bronzed drongo, Dicrurus aeneus
Lesser racket-tailed drongo, Dicrurus remifer
Square-tailed drongo, Dicrurus ludwigii
Shining drongo, Dicrurus atripennis
Fork-tailed drongo, Dicrurus adsimilis
Velvet-mantled drongo, Dicrurus modestus
Aldabra drongo, Dicrurus aldabranus
Grand Comoro drongo, Dicrurus fuscipennis
Crested drongo, Dicrurus forficatus
Mayotte drongo, Dicrurus waldenii
Black drongo, Dicrurus macrocercus
Ashy drongo, Dicrurus leucophaeus
White-bellied drongo, Dicrurus caerulescens
Crow-billed drongo, Dicrurus annectans
Hair-crested drongo, Dicrurus hottentottus
Tablas drongo, Dicrurus menagei
Balicassiao, Dicrurus balicassius
Sulawesi drongo, Dicrurus montanus
Sumatran drongo, Dicrurus sumatranus
Wallacean drongo, Dicrurus densus
Paradise drongo, Dicrurus megarhynchus
Spangled drongo, Dicrurus bracteatus
Andaman drongo, Dicrurus andamanensis
Greater racket-tailed drongo, Dicrurus paradiseus
Sri Lanka drongo, Dicrurus lophorinus
Andaman drongo, Dicrurus andamanensis