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A survey of the Breeding Seabirds and Migrating Shorebirds of the Houtman Abrolhos, Western Australia

Category: Issue 4
Author(s): Surman, Nicholson
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A complete survey of the numbers and breeding stages of seabirds, resident and migratory shorebirds and raptors at the Houtman Abrolhos Islands, central west coast, Western Australia, was undertaken. One hundred and ninety two (192) islands, islets and rocks were surveyed over 21 days in December 2006. Seabird nesting habitat was mapped in its entirety […]

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Swiftlet behaviour responses to Predators in proximity to their nests

Category: Issue 4
Author(s): Michael Tarburton
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When they have the opportunity, swiftlets nest in totally dark parts of caves. This prevents most predation on eggs, young and incubating adults. However, a few predators are able to either reach the nests or prey on birds flying to and from nests. In response, swiftlets have developed anti-predatory behaviour. To reduce predation, adult birds […]

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Food of Wintering Cattle Egrets Ardea ibis

Category: Issue 4
Author(s): Gosper
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Regurgitates and oesophageal contents from five Cattle Egrets Ardea ibis found dead under powerlines near a winter roost in northern New South Wales were analysed. The major prey components (by number) were orthopteran insects (42.8%), spiders (22.6%), flies (22.0%) and lepidopterans (7.9%). Both the range of prey, and those types comprising the major components, were […]

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