Notes on the Nesting Biology of the Great Bowerbird Chlamydera nuchalis (Ptilonorhynchidae)

Abstract

Two Great Bowerbird Chlamydera nuchalis nests were studied and their situations, location relative to an active bower, and egg measurements are described, discussed, and compared with those of congeners. Limited evidence for polygamous bowerbirds suggests that some females nest relatively close to an active bower. Results of 28.8 hours of observation of incubation and 63.5 hours of nestling feeding activity are presented. Levels of egg and nestling parental attendance are compared with other bowerbirds. Of 208 identifiable nestling meals 116 were animals and 92 were fruit. Of animal meals 54% were large grasshoppers (Acridoidea) and of fruit meals 44% were figs (Ficus). A single parent, presumably female, attended the nest. Vocal mimicry at the nest by females and at the bower by males, particularly of predatory bird calls, is discussed. Egg laying, nesting season, clutch size and nestling period are reviewed.