Thứ Năm, 13 tháng 6, 2013

Jackson's widowbird

Euplectes jacksoni

Photo by Szymon Beuch (Forum Przyroda)

Common name:
Jackson's widowbird (en); bispo-de-Jackson (pt); euplecte de Jackson (fr); obispo de Jackson (es); leierschwanzwida (de)

Taxonomy:
Order Passeriformes
Family Ploceidae

Range:
These birds are found in central and western Kenya and north-eastern Tanzania.

Size:
The females are 14 cm long but the males reach 30 cm due to the large tail they develop with their breeding plumage. Males are also 40% heavier than females.

Habitat:
The Jackson's widowbird is found high-altitude grasslands and arable land. They are present at altitudes of 1.500-3.000 m.

Diet:
They feed on grass seeds, particularly those of Themeda triandra and Panicum, as well as termite alates.

Breeding:
Jackson's widowbirds are polygynous and can breed all year round. The males perform a peculiar dance to attract females, matting with several females and having no further part in the breeding process. The nest is a domed ball of woven grass with a side entrance, lined with grass seed-heads, usually placed within 10 cm of the ground in a tuft of grass, with living grass bent down over it to form a bower. There the female lays 2-4 eggs which she incubates for 12-13 days. The chicks are fed by the female and fledge 17 days after hatching.

Conservation:
IUCN status - NT (Near-Threatened)
This species has a relatively large breeding range and is described as locally common.
The population is suspected to be in decline owing to ongoing habitat destruction and fragmentation, as a result of intensified agricultural development and livestock production. Fires, started by pastoralists to control ticks, are common in the dry season, and temporarily destroy most suitable habitat.

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