The nest, eggs and nestling development of Fork-tailed Woodnymph Thalurania furcata boliviana

Abstract

Fork-tailed Woodnymph Thalurania furcata is widely distributed in South America, but there are comparatively few data on its breeding biology. A nest found with two eggs in an urban forest fragment in Acre, south-west Amazonia, was monitored until the nestlings fledged. The use of fibres from rhizomes of the fern Phlebodium decumanum as the main material used in the nest is reported for the first time in this species. Similarly, daily variation in the mass and growth of the nestlings is presented for the first time. Nest and egg dimensions, as well as the nestling period, were similar to those reported previously.