First nest descriptions of Olive-faced Flatbill Tolmomyias viridiceps

Little is known about the natural history of many species of Neotropical birds, with descriptions of the nests of many species still lacking or incomplete. Published descriptions exist for five of the seven species of Tolmomyias flatbills. Here, we provide the first such data for Olive-faced Flatbill T. viridiceps on the basis of three nests, one each in Brazil, Ecuador and Peru. As typical for the genus, the nest is a closed, retort-shaped, pensile structure suspended from a limb; in two cases, nests were sited close to an active paper wasp (Vespidae) nest. In each of four instances when we obtained photos as an adult left the Peru nest, it exited the entrance tube backwards, rather than head-first.