Saturday, November 16, 2019

The nesting of the North Island Kokako ( Callaeas cinerea wilsoni ) - review of accounts from 1880 to 1989

TitleThe nesting of the North Island Kokako ( Callaeas cinerea wilsoni ) - review of accounts from 1880 to 1989
Publication TypeJournal Article
Year of Publication1995
AuthorsInnes, J, Hay, R
JournalNotornis
Volume42
Issue2
Pagination79-93
Type of Articlepaper
Keywordsbehaviour, Callaeas cinerea, Kokako, nesting, predation
Abstract

We review 16 published and 17 previously unpublished accounts of the nesting of North Island Kokako (Callaeas cinerea wilsoni) recorded between 1880 - 1989. Nests were on average 8.5 m above ground, in many different tree species, but usually with dense overhead cover. Kokako laid eggs from October to February. The modal clutch had three eggs or young, four nests had two. Only the female built the nest, incubated, and brooded young, though the male fed the female at or near the nest throughout the nesting period. Incubation took about 18 days and fledging about 31 days. We suggest that several aspects of Kokako nesting evolved in response to diurnal avian predation, and that these behaviours give ineffective protection against nocturnal, arboreal, introduced mammal predators.

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