The Ploceidae, or weavers, are small passerine birds related to the finches.Many weaver species are gregarious and breed colonially. The birds build their nests together for protection, often several to a branch. Usually the male birds weave the nests and use them as a form of display to lure prospective females. The weaver bird colonies may be found close to water bodies. Weaver birds, also known as weaver finches, get their name because of their elaborately woven nests.