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 Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.

Distribution of tree hollows and hollow preferences by parrots in an urban landscape.

Adrian Davis, Richard Major, Charlotte Taylor


The number of hollow-bearing trees, and associated hollows contained within urban habitats, continues to decline as cities expand. Remaining hollows may be unsuitable for individual parrot species that have specific preferences or requirements for certain characteristics of tree hollows. To determine the distribution of hollow-bearing trees and tree hollows in Sydney, Australia, we surveyed 264 sites within parks, streetscapes, golf courses, remnant vegetation and continuous forest. To determine whether particular species of parrot were associated with specific hollow characteristics, motion-activated video cameras were installed to monitor usage of hollows in remnant vegetation and continuous forest. The number of both hollows and of hollow-bearing trees varied significantly amongst habitats, with all urban habitats having significantly fewer hollow-bearing trees than did continuous forest. There was no significant difference in the number of hollows contained within remnant vegetation and continuous forest. Hollow visitation by the Rainbow Lorikeet, Sulphur-crested Cockatoo and the Australian King Parrot was significantly associated with particular hollow characteristics, most importantly hollow type, hollow-orientation and tree species. Knowledge of the distribution of hollow-bearing trees throughout landscapes, as well as the characteristics of hollows that are associated with particular parrot species, is crucial to conserve populations of hollow dependent bird species in urban areas.

MU13065  Accepted 03 February 2014
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