Postnatal Development of the Violet Sabrewing in Costa Rica

摘要

I observed the incubation and nes- tling periods of five nests of the Violet Sabrewing (Campylopterus hemileucurus) in Costa Rica. Each nest was built above running water. Mean incubation period was 20 d and only the female incubated. Mean nestling period lasted 23 d. Nestlings reached and sur- passed adult adult mass before fledging (132 /100 of adult size in males and 130 /100 in females), although wing, tail, and culmen length did not reach adult size until after fledging.