Breeding biology in grebes (Podicipedidae) is less understood than that of other waterbirds in Australia. This paper reports on a study of breeding Australasian Grebes (Tachybaptus novaehollandiae) on five urban wetlands in Sydney, New South Wales, from 2001 to 2011. During the 10 years of the study, breeding pairs only used the two main study sites (Lime Kiln Bay Wetland and Moore Reserve Wetland) in 20% and 30% of the breeding seasons, respectively. Two nests and two nest building attempts from one site and one pair during the 2010–2011 breeding season are described, while the development and survival of 23 chicks (n = 5 broods) during the 10 years are also described. The proportion of chicks surviving to adult plumage was 39%. Brood rivalry and parental favoritism were observed. Chicks were capable of some independent behavior (e.g., preening and short dives) within 1 week of hatching; chicks not favored by their parents were forced to accelerate their development.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 38 • No. 3