__NOTOC__ The indigobirds and whydahs, together with the

cuckoo-finch The cuckoo-finch (''Anomalospiza imberbis''), also known as the parasitic weaver or cuckoo weaver, is a small passerine bird now placed in the family Viduidae with the indigobirds and whydahs. It occurs in grassland in Africa south of the Sahara. ...

, make up the family Viduidae; they are small

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by th ...

birds native to

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

. These are finch-like species which usually have black or indigo predominating in their plumage. The birds named "whydahs"The

yellow-mantled widowbird The yellow-mantled widowbird (''Euplectes macroura''), also known as the yellow-backed widow, is a species of bird in the family Ploceidae. It is the type species of the genus '' Euplectes'', originally named for the city of Ouidah in Benin. Nowad ...

was the type species of its genus, and was originally named from the city of

Ouidah Ouidah () or Whydah (; ''Ouidah'', ''Juida'', and ''Juda'' by the French; ''Ajudá'' by the Portuguese; and ''Fida'' by the Dutch) and known locally as Glexwe, formerly the chief port of the Kingdom of Whydah, is a city on the coast of the Repub ...

in Benin. Nowadays the name whydah (i.e. Ouidah) is however applied to the long-tailed species of the Viduidae. have long or very long tails in the breeding male. All are obligate brood parasites, which lay their eggs in the nests of

estrildid finch Estrildidae, or estrildid finches, is a family of small seed-eating passerine birds of the Old World tropics and Australasia. They comprise species commonly known as munias, mannikins, firefinches, parrotfinches and waxbills. Despite the word "fi ...

species; most indigobirds use

firefinch The firefinches form a genus, ''Lagonosticta'', of small seed-eating African birds in the family Estrildidae. The genus was introduced by the German ornithologists Jean Cabanis in 1851. The type species was subsequently designated as the Africa ...

es as hosts, whereas the paradise whydahs chose

pytilia Pytilia is a genus of small brightly coloured seed-eating birds in the family Estrildidae. They are distributed across Africa. Taxonomy The genus ''Pytilia'' was introduced in 1837 by the English naturalist William John Swainson for the red-win ...

s. Unlike the

cuckoo Cuckoos are birds in the Cuculidae family, the sole taxon in the order Cuculiformes . The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals and anis. The coucals and anis are sometimes separ ...

s and

honeyguide Honeyguides (family Indicatoridae) are near passerine birds in the order Piciformes. They are also known as indicator birds, or honey birds, although the latter term is also used more narrowly to refer to species of the genus '' Prodotiscus''. Th ...

s, the indigobirds and whydahs do not destroy the host's eggs. Typically, they lay 2–4 eggs in with those already present. The eggs of both the host and the victim are white, although the indigobird's are slightly larger. Many of the indigo-plumaged species named "indigobirds" are very similar in appearance, with the males difficult to separate in the field, and the young and females near impossible. The best guide is often the estrildid finch with which they are associating, since each indigobird parasitises a different host species. For example, the

village indigobird The village indigobird (''Vidua chalybeata''), also known as the steelblue widowfinch or (in U.S. aviculture) the Combassou finch, is a small songbird belonging to the family Viduidae. It is distinguishable from other indigobird species by bill an ...

is usually found with red-billed firefinches. Indigobirds and whydahs imitate their host's song, which the males learn in the nest. Although females do not sing, they also learn to recognise the song, and choose males with the same song, thus perpetuating the link between each species of indigobird and firefinch. The nestling indigobirds mimic the unique

gape The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food ...

pattern of the fledglings of the host species. The matching with the host is the driving force behind speciation in this family, but the close genetic and morphological similarities among species suggest that they are of recent origin. The family contains two genera:

References

Sources

External links

Whydahs and indigobirds (Viduidae)
information, including 7 species with videos and 9 with photographs at th
Internet Bird CollectionIndigobirds.com
{{Authority control Bird families Brood parasites