Breeding biology of the South Island saddleback ( Philesturnus carunculatus carunculatus , Callaeatidae) | Notornis and Birds New Zealand

Notornis

Hooson, S¹  Jamieson, IG¹ 

关键词: Breaksea Island;    breeding behaviour;    Callaeatidae;    Motuara Island;    Philesturnus carunculatus carunculatus;    South Island saddleback;    Ulva Island;   

DOI  :  

学科分类：动物科学

来源: Ornithological Society of New Zealand Inc.

【 摘 要 】

This study provides a first description of breeding biology of the South Island saddlebacks (Philesturnus carunculatus carunculatus) and the first comparisons with North Island saddlebacks (P.c. rufusater), using data collected from Ulva (Stewart Island), Breaksea (Fiordland) and Motuara (Marlborough Sounds) Islands, New Zealand. We found courtship and copulation behaviour to be similar to that of North Island saddlebacks. So too were nest locations, heights and materials, with nest materials determined by their proximity to the nest site. On Motuara and Ulva Islands, most nests were located in natural cavities (54% and 80%, respectively), while on Breaksea Island, 67% of nests were in flax (Phormium cookianum). In the recently established Ulva Island population, saddlebacks had a median and maximum clutch size of two and laid a maximum of two clutches. This contrasts with translocated island populations of North Island saddlebacks where up to four-egg clutches and four clutches per season have been recorded for pairs breeding in the first few seasons post-release. Incubation and brooding behaviour was like that described for North Island saddleback. A small number of yearlings bred successfully on Ulva Island (0.18 birds/ha), but no yearlings bred on Motuara (0.42 birds/ha) and Breaksea (0.42 birds/ha) islands.

【 授权许可】

Unknown