The indigobirds, whydahs and cuckoo-finch 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 generally have an anisodactyl arrangement of their ...

birds native to

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

. These are finch-like species which usually have black or indigo predominating in their plumage. The birds named "whydahs"The yellow-mantled widowbird was the type species of its genus, and was originally named from the city of

Ouidah Ouidah (English: ; French: ) 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 t ...

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 parasite Brood may refer to: Nature * Brood, a collective term for offspring * Brooding, the incubation of bird eggs by their parents * Bee brood, the young of a beehive * Individual broods of North American periodical cicadas: ** Brood X, the largest ...

s, which lay their eggs in the nests of

songbird A songbird is a bird belonging to the suborder Passeri of the perching birds (Passeriformes). Another name that is sometimes seen as the scientific or vernacular name is Oscines, from Latin ''oscen'', "songbird". The Passeriformes contains 5,00 ...

species; most indigobirds use firefinches as hosts, whereas the paradise whydahs choose pytilias and the cuckoo-finch parasitises cisticolids. 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 somet ...

s and

honeyguide Honeyguides (family (biology), family Indicatoridae) are a family of 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 ''Pro ...

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 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 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 Birds of Sub-Saharan Africa