male U. b. bengalus
Systematics
female U. b. bengalus
When he first described the red-cheeked cordon-bleu in his 1766 edition of Systema Naturae, Carl Linnaeus assigned it to the genus Fringilla.[2] It was later moved to the genus Uraeginthus, along with the rest of the cordon-bleus and the grenadiers.[3] The red-cheeked cordon-bleu, the blue-capped cordon-bleu, and the blue waxbill—form a species group within the genus. Further, the red-cheeked cordon-bleu may form a superspecies with the blue waxbill, with which it shares similar habitats.[4]
There are five subspecies, which differ primarily in the amount of blue on the face and underparts of the females.[5]
- U. b. bengalus (Linnaeus, 1766)
- U. b. brunneigularis Mearns, 1911
- U. b. katangae Vincent, 1934[6]
- U. b. littoralis Someren, 1922
- U. b. ugogoensis Reichenow, 1911
Description
Like other members of its genus, the red-cheeked cordon-bleu is a very small finch, measuring only 12.5–13 cm (4.9–5.1 in) in length.[2] It weighs 9.9 g (0.35 oz) on average, with known extremes in wild populations ranging from 8.9–11 g (0.31–0.39 oz).[8] The adult male has uniformly brown upperparts, pale blue breast, flanks and tail and a yellow belly. There is a red patch on each cheek, but this can rarely appear orange or even yellow. Females are similar but duller, and lack the cheek spot. Immature birds are like the female, but with blue restricted to the face and throat.Voice
Its contact call is a thin, high-pitched piping, often repeated, and variously transcribed as siii siii or tsee tsee.[5][9] The song is more complex, consisting of 4–6 high-pitched notes, the last of which is longer, lower and more burry. Described as "rhythmic but lazy",[5] it has been transcribed as wit-sit-diddley-diddley-ee-ee.[9] Unlike many other passerines, but like all cordon-bleu species, female red-cheeked cordon-bleus sing; they also help to defend a small area around their nest site. Their song is less complex than that of the males, and they sing less frequently. Female song peaks primarily before egg-laying, and is thought to help with pair bond maintenance or breeding synchronization.[10]Habitat and range
The red-cheeked cordon-bleu is common and widespread across much of central and eastern Africa. Its range stretches from the West African countries of Senegal, Gambia and southwestern Mauritania east through southern Mali, southern Niger, southern Chad and southern Sudan to Ethiopia and northwestern and southwestern Somalia, and then south to southern Democratic Republic of the Congo, eastern Angola, northern and western Zambia, southern Tanzania and northern Mozambique. It has also been introduced to the Hawaiian Islands of Hawaii and Oahu.[11] It has been found one time (in 1924) on Cape Verde and was recorded in the Maadi area in northern Egypt during the mid-1960s; the latter birds may have been escaped cage birds, as there have been no records since.[12]It is found in all habitats except forest interiors,[5] at elevations ranging from sea level to 2,430 m (7,970 ft).[13]
Behaviour
It is frequently seen at open dry grassland and savanna habitats as well as around human habitation.Feeding
The red-cheeked cordon-bleu is a granivore, feeding principally on grass seeds, but also on millet and other small seeds.[2] It is also known to feed sporadically on beeswax.[14] Larger granivores, such as the pin-tailed whydah will chase cordon-bleus from food sources, limiting the feeding opportunities of the smaller birds and affecting their foraging success.[15]Breeding
The nest is a large domed grass structure with a side entrance in a tree, bush or thatch into which 4–5 white eggs are laid.Origin
Origin and phylogeny has been obtained by Antonio Arnaiz-Villena et al.[16] Estrildinae may have originated in India and dispersed thereafter (towards Africa and Pacific Ocean habitats).Aviculture
The red-cheeked cordon-bleu is reported to be "among the most popular exotic finches".[17] While it has no special housing requirements, its habit of roosting on open branches (rather than in a nest or other protected area) makes it sensitive to low temperatures. During the breeding season, captive males become very aggressive towards each other, and birds disturbed during incubation will typically leave the nest.[17]Gallery
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Niagara Falls Aviary, Canada
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Female in Kenya
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