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Population of the Silver Gull Larus novaehollandiae on the Capricorn and Bunker Islands, Great Barrier Reef.

Category: Issue 4
Author(s): Walker
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Silver Gulls were censused from January 1983 to March 1985 on the Capricorn and Bunker Islands. Gulls moved between the islands, congregating at sites where food scraps and people were most abundant. Such sites were permanent, as at Heron Island, or temporary when campers and fishermen were present at other islands. On winter days up […]

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Moult by the Galah Cacatua rosiecapilla in the Wheatbelt of Western Australia.

Category: Issue 4
Author(s): Ian Rowley
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Primary moult by the Galah in the Western Australian wheatbelt extended over 155 to 185 days in 1972. Immature nonbreeding birds started earlier (October) and took longer (185 days) than adults. Breeding birds started to moult in November after most progeny were feathered but before they had fledged. Females took less time to moult than […]

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Some aspects of the biology and conservation of the Thick-billed Grass-wren Amytornis textilis in the Shark Bay area, Western Australia.

Category: Issue 4
Author(s): Brooker
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Colour-banded populations of Thick-billed Grasswrens Amytornis textilis were studied over three years at two sites in the Shark Bay region, Western Australia. The estimated density (2-3/ha) for the site on Peron Peninsula was surprisingly high and it is likely that the northern two-thirds of the Peninsula is the major stronghold of this species in Western […]

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