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The red-billed quelea (/ˈkwiːliə/; Quelea quelea), also known as the red-billed weaver or red-billed dioch, is a small, seasonally nomadic, sparrow-like bird of the weaver family, Ploceidae, native to sub-Saharan Africa. It is approximately 12 cm (4.7 in) long and weighs 15 to 26 g (0.53 to 0.92 oz).
It was named by Linnaeus in 1758, who considered it a bunting, but Ludwig Reichenbach assigned it in 1850 to the new genus Quelea. Three subspecies are recognised, with Q. q. quelea occurring roughly from Senegal to Chad, Q. q. aethiopica from Sudan to Somalia and Tanzania, and Q. q. lathamii from Gabon to Mozambique and South Africa. Non-breeding birds have light underparts, striped brown upper parts, yellow-edged flight feathers and a reddish bill. Breeding females attain a yellowish bill. Breeding males have a black (or rarely white) facial mask, surrounded by a purplish, pinkish, rusty or yellowish wash on the head and breast. The species avoids forests, deserts and colder areas such as those at high altitude and in southern South Africa. It constructs oval roofed nests woven from strips of grass hanging from thorny branches, sugar cane or reeds. It breeds in very large colonies.