Black-capped social weaver | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Ploceidae |
Genus: | Pseudonigrita |
Species: | P. cabanisi |
Binomial name | |
Pseudonigrita cabanisi | |
Synonyms | |
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The black-capped social weaver (Pseudonigrita cabanisi) is a sparrow-like species of bird that has been assigned to the weaverbird family. It was originally described by Fisher and Reichenow, and later re-classified by the latter to the genus Pseudonigrita. Adults have a large black cap, ivory-colored bill, red eyes, brown back and wings, blackish-brown tail, white throat and underparts with a black midline, and dark horn-colored legs. It breeds in colonies and roofed nests with an entrance at the bottom in thorny trees such as acacias are constructed by the male from grass stems. It is found in parts of Ethiopia, Kenya, Somalia, and Tanzania. It is sometimes kept and bred in captivity. [2]
In 1884, the black-capped social weaver was first described by German East-Africa explorer Gustav Fischer and German ornithologist Anton Reichenow as Nigrita cabanisi, based on a specimen collected in 1883 by Fischer in the Pare Mountains. In 1903, Reichenow assigned the species to his newly erected genus Pseudonigrita , because he considered P. arnaudi and P. cabanisi related to weaverbirds (Ploceidae), while the other species Nigrita bicolor , N. canicapillus , N. fusconota and N. luteifrons are negrofinches assigned to the estrildid finches. In 1942, Hans von Boetticher was of the opinion that our species was different enough to assign it to its own genus, and made the new combination Somalita cabanisi. [3] [4] The species name cabanisi, honors Jean Cabanis, a German ornithologist. There are no subtaxa. [5]
"Black-capped social weaver" has been designated the official name by the International Ornithological Committee (IOC). [6] Other common names include Cabanis's social waxbill and black-headed sociable weaver.
Based on recent DNA-analysis (which did not include P. cabanisi ), the genus Pseudonigrita belongs to the group of sparrow weavers (subfamily Plocepasserinae), and is most related to Philetairus socius . This clade is sister to Plocepasser . [7] Provided that the sister relationship between the Pseudonigrita-species is correct, the following tree expresses current insights.
family Ploceidae |
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The black-capped weaver is 13 cm (5.1 in) long and weighs 18–24 g (0.63–0.85 oz). Adult birds have an extensive and well-delimited black cap that runs from the bill opening, across the crown to the back neck, and also covers the area around the eye and ear. The neck, mantle, wings and rump are evenly brown. The tail is blackish brown. The throat, sides of the neck, breast, belly and vent are white. A clearly visible narrow longitudinal black stripe runs along the middle of belly to the stomach. Some black feathers also mark the side of the breast, but these are often difficult to see as they may partially or completely be covered by the wings. The legs are a dark horn color. The bill is ivory-colored. The eyes are bright red. [2] [8]
Young birds miss the black markings entirely, which instead are the same brownish shade as the mantle and wings. The bill of juveniles is horn-colored and the iris is dark brown. [2]
Pseudonigrita cabanisi occurs in central and southern Ethiopia, much of Kenya, a patch of Somalia towards the tripoint with Ethiopia and Kenya, and in northern Tanzania. The black-capped social weaver prefers semi-arid savannas dominated by acacias and other thorny bushes. [5]
The black-capped social weaver is monogamous and breeds in colonies. It feeds primarily on grass seeds, but also takes juicy vegetation to get enough water, and insects, particularly to feed the nestlings. [5]
Favoured nesting trees include Acacia -species, Delonix and Euphorbia, and the roofed nests that are constructed by both male and female, are attached from thin, hanging branches, and are made of many straight grass straws. Nests have two downward-facing entrances, one of which is closed as soon as the eggs are laid until the moment the youngsters fledge. [5] [9] A clutch is made of two to four eggs of 19 mm (0.75 in) long and 14 mm (0.55 in) in diameter, white or pinkish in color, with brown or violet markings. [5]
The black-capped social weaver is sometimes kept and bred in captivity by hobbyists. It can best be kept in a confinement without other bird species, since the best results can be reach with larger groups of this species. Contrary to the grey-capped social weaver, single pairs have been known to breed successfully however. The birds are also very tolerant, and can be combined with other species. A specialised website suggests to provide hanging branches that can be used to attach nests, without plant cover underneath. The rest of the cage may be planted with grass and a few tough shrubs. A large quantity of nesting material, such as grass straws, very thin twigs or coconut fibre must be provided for building the nests. The birds feed primarily on seeds with a smaller percentage of insects, but it is not known what the optimal mix is. In nature they also eat flowers, leaves and fruits, probably as a source of water when surface water is not available. In captivity, for instance cucumber and lettuce can be given. During the breeding season living insects, insect paste or shredded egg is needed to raise the chicks successfully. Fine stone grit and calcium sources, such as shell grit and cuttlebone, need to be provided. Due to its large demand in nesting material, excessive theft may occur if other Plocepasserinae-species are kept in the same confinement. This website notes that males sometimes throw chicks out of the nest. Replacing mealworms by small crickets may help combat this undesirable behaviour. [2]
Ploceidae is a family of small passerine birds, many of which are called weavers, weaverbirds, weaver finches and bishops. These names come from the nests of intricately woven vegetation created by birds in this family. In most recent classifications, Ploceidae is a clade, which excludes some birds that have historically been placed in the family, such as some of the sparrows, but which includes the monotypic subfamily Amblyospizinae. The family is believed to have originated in the mid-Miocene. All birds of the Ploceidae are native to the Old World, most in Africa south of the Sahara, though a few live in tropical areas of Asia. A few species have been introduced outside their native range.
The Indian silverbill or white-throated munia is a small passerine bird found in the Indian Subcontinent and adjoining regions that was formerly considered to include the closely related African silverbill. This estrildid finch is a common resident breeding bird in the drier regions of the Middle East and the Indian Subcontinent. It has also been introduced into many other parts of the world and has become established in some areas. They forage in small flocks in grassland and scrub habitats.
The village weaver , also known as the spotted-backed weaver or black-headed weaver, is a species of bird in the family Ploceidae found in much of sub-Saharan Africa. It has also been introduced to Portugal and Venezuela as well as to the islands of Hispaniola, Martinique, Puerto Rico, Mauritius and Réunion.
The red-billed quelea, also known as the red-billed weaver or red-billed dioch, is a small—approximately 12 cm (4.7 in) long and weighing 15–26 g (0.53–0.92 oz)—migratory, sparrow-like bird of the weaver family, Ploceidae, native to Sub-Saharan Africa.
The chestnut sparrow is a species of passerine bird in the sparrow family Passeridae. It is the smallest member of the sparrow family, at about 11 cm (4.3 in) long. The breeding male has deep chestnut plumage and the female and juvenile are coloured a duller grey with some chestnut markings. Like its closest relatives in the genus Passer, the Arabian golden sparrow and the Sudan golden sparrow, it is gregarious and found in arid areas. Ranging through the east of Africa from Darfur in Sudan to Tanzania, it is found in dry savanna, papyrus swamps, and near human habitation. Adults and juveniles both feed mostly on grass seeds, and fly in flocks, often with other species of birds, to find food. It nests in trees, building its own domed nests, and also usurping the more elaborate nests of weavers.
The Cape sparrow, or mossie, is a bird of the sparrow family Passeridae found in southern Africa. A medium-sized sparrow at 14–16 centimetres (5.5–6.3 in), it has distinctive plumage, including large pale head stripes in both sexes. Its plumage is mostly grey, brown, and chestnut, and the male has some bold black and white markings on its head and neck. The species inhabits semi-arid savannah, cultivated areas, and towns, and ranges from the central coast of Angola to eastern South Africa and Eswatini. Three subspecies are distinguished in different parts of its range.
The baya weaver is a weaverbird found across the Indian Subcontinent and Southeast Asia. Flocks of these birds are found in grasslands, cultivated areas, scrub and secondary growth and they are best known for their hanging retort shaped nests woven from leaves. These nest colonies are usually found on thorny trees or palm fronds and the nests are often built near water or hanging over water where predators cannot reach easily. They are widespread and common within their range but are prone to local, seasonal movements mainly in response to rain and food availability.
The white-headed buffalo weaver or white-faced buffalo-weaver is a species of passerine bird in the family Ploceidae native to East Africa. The buffalo part of its name derives from its habit of following the African buffalo, feeding on disturbed insects. Two subspecies are recognized.
The blue waxbill, also called southern blue waxbill, blue-breasted waxbill, southern cordon-bleu, blue-cheeked cordon-bleu, blue-breasted cordon-bleu and Angola cordon-bleu, is a common species of estrildid finch found in Southern Africa. It is also relatively commonly kept as an aviary bird.
The white-browed sparrow-weaver is a predominantly brown, sparrow-sized bird found throughout central and north-central southern Africa. It is found in groups of two to eleven individuals consisting of one breeding pair and other non-reproductive individuals.
The red-billed buffalo weaver is a species of bird in the family Ploceidae. It is found in eastern and southern Africa. Its natural habitat is the dry savanna.
The sociable weaver is a species of bird in the weaver family that is endemic to southern Africa. It is the only species in the monotypic genus Philetairus. It is found in South Africa, Namibia, and Botswana. but their range is centered within the Northern Cape Province of South Africa. They build large compound community nests, a rarity among birds. These nests are perhaps the most spectacular structure built by any bird.
The sparrow-weavers (Plocepasser) are a genus of birds in the family Ploceidae (weavers), but some taxonomic authorities place them in the family Passeridae.
The orange weaver is a species of bird in the weaver family, Ploceidae. It is sparsely distributed across African tropical rainforest.
The baglafecht weaver is a species of weaver bird from the family Ploceidae which is found in eastern and central Africa. There are several disjunct populations with distinguishable plumage patterns. Only some races display a discrete non-breeding plumage.
The Taveta weaver, also known as the Taveta golden weaver, is a species of bird in the weaver family, Ploceidae. It is found on the African savannah in Kenya and Tanzania. The name of the bird comes from the unique markings/coloration of the bird, as well as how these birds weave intricate nests.
The nelicourvi weaver is a species of bird in the family Ploceidae. It is endemic to Madagascar. Together with its closest relative, the sakalava weaver, it is sometimes placed in a separate genus Nelicurvius. A slender, sparrow-like bird, it is 15 cm (5.9 in) long and weighing 20–28 g (0.71–0.99 oz). Breeding males have a black bill and head, brown eyes, yellow collar, grey belly, chestnut-brown lower tail coverts, olive back, and blackish flight feathers edged greenish. Non-breeding males have mottled grey and green heads. In the breeding female the front of the head is yellow and the back olive green, with a broad yellow eyebrow. It builds solitary, roofed, retort-shaped nests, hanging by a rope from a branch, vine or bamboo stem, in an open space. It primarily feeds on insects, looking on its own or in very small groups, often together with long-billed bernieria. Its natural habitat is subtropical or tropical moist lowland and mountain forests. The conservation status of Nelicourvi weaver is least concern according to the IUCN Red List.
The Sakalava weaver sometimes known as the Sakalava fody is a species of bird in the family Ploceidae. It is endemic to Madagascar. The bird is 15 cm (5.9 in) long and weighs 20–28 g (0.71–0.99 oz).
The grey-capped social weaver is a sparrow-like liver-colored bird, with a pale grey crown, a dark grey bill, a whitish eye-ring, horn-colored legs, with some black in the wing and a light terminal band in the tail, that builds roofed nests made of straws, breeds in colonies in thorny Acacia trees, and feeds in groups gathering grass seeds and insects. Male and female have near identical plumage. DNA-analysis confirms it is part of the weaver family. It is found in Ethiopia, Kenya, Somalia, South Sudan, Sudan, Tanzania, and Uganda.
Pseudonigrita is a genus of sparrow-like birds in the weaverbird family.