The Nesting Biology of the Ribbon-tailed Astrapia Astrapia mayeri (Paradisaeidae)

Abstract

Thirteen active Ribbon-tailed Astrapia Astrapia mayeri nests were examined in forests of Tari Gap, Southern Highlands, Papua New Guinea. Most were in isolated small trees and often in secondary growth, possibly to reduce predation. A uniquely female-plumaged parent at one nest enabled us to confirm uniparental, assumed female, nest attendance. Nests and single egg clutches are decribed, and are typical of Paradisaeinae. One nestling first departed the nest at 26 days and finally at 30 days old, and its growth and development are described. Nesting was observed during October to February inclusive. Of identified nestling meals 67% were of fruit and 33% animal foods. Of identifiable nestling fruit meals 66% were of Scheflera fruit pieces; 74% of nestling faecal samples included this fruit. Results of 19 h observation of incubation and 66 h of nestling care activity are presented. Nidification of congeneric species is reviewed.