The sociable weaver (Philetairus socius) is a species of bird in the weaver family that is endemic to southern Africa. It is found in South Africa, Namibia, and Botswana. They build large compound community nests, a rarity among birds. These nests are perhaps the most spectacular structure built by any bird. Measuring around 14 cm (5.5 in) in length, the sociable weaver has a black chin, black barred flanks and a scalloped back. They weigh 26-32 g (0.92-1.13 oz), and sexes are indistinguishable.