Publications


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Showing 12 of 1617 documents

SEXUAL DIMORPHISM IN THE PROVIDENCE PETREL Pterodroma solandri USING DNA ANALYSIS

Posted: 11/04/2021
Author(s): ADAM J. BESTER, N. I. KLOMP and D. PRIDDEL

The Providence Petrel Pterodroma solandri was studied on Lord Howe lsland during the 2000 breeding season. Molecular sexing was conducted on feather samples taken from 18 pairs of breeding birds. Morphological measurements taken from these sexed birds indicate that males were significantly heavier than females (mean mass of males 507.2 ± 415.9; females 476.6 ± […]

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FURTHER OBSERVATIONS ON THE BREEDING BIOLOGY OF THE POWERFUL OWL Ninox strenua lN SOUTH-EASTERN AUSTRALIA

Posted: 11/04/2021
Author(s): EDWARD G. McNABB, RODNEY P. KAVANAGH and STEPHEN A. CRAIG

This paper describes significant new information on the breeding biology of the Powerful Owl Ntnox strenua from Victoria and New South Wales. The observations were made in areas of eucalypt forest within the urban fringes of major cities (Melbourne a nd Sydney) and in more secluded forest near Eden in south-eastern NSW. A banded first […]

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A SURVEY OF DIURNAL RAPTORS IN THE RICHMOND RIVER DISTRICT, NEW SOUTH WALES, 1996-99

Posted: 11/04/2021
Author(s): D. G. GOSPER

Between 1996 and 1999 diurnal raptors were counted using roadside surveys in the Richmond River district in north-eastern New South Wales. A total of 3 101 raptors of 17 species  as recorded. Relative abundance of raptors (all species), expressed in terms of individual sp er 100 kilometres travelled, was 10.75 birds per 100 kilometres, which […]

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Habitats of the Grey Grasswren Amytornis barbatus diamantina and a review of the species’ distribution

Posted: 11/04/2021
Author(s): Andrew Black, Graham Carpenter, Reece Pedler, Lynn Pedler, Peter Langdon

Grey Grasswrens Amytornis barbatus were first described in swamps at the termination of the Bulloo River and that population and nominate subspecies is now considered threatened. A second subspecies is found to the north in wetlands of the Diamantina/Goyder Lagoon/Warburton system. We found the species at 54 sites within the Goyder Lagoon/Warburton floodplain and conclude […]

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Impact of feral Water Buffalo Bubalus bubalis grazing on White-bellied Sea-Eagle Haliaeetus leucogaster breeding success in subtropical river habitat in the Northern Territory, Australia

Posted: 11/04/2021
Author(s): Laurie Corbett, Tony Hertog

Diet and breeding success of White-bellied Sea-Eagles Haliaeetus leucogaster in Kakadu National Park were compared between years with (1980–85) and without (1992–94) high densities of feral Water Buffalo Bubalus bubalis. Overall, prey comprised turtles (39.8%), fish (26.5%), birds (28.3%), mammals (4.4%) and snakes (0.9%) and there was no signifi cant difference in diet between years […]

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The feeding behaviour and diet of the Black-necked Stork Ephippiorhynchus asiaticus australis in northern New South Wales

Posted: 11/04/2021
Author(s): Greg. P. Clancy

Field studies were carried out over a two and three-quarter year period (2003–2005) to study the feeding behaviour and diet of free-flying Black-necked Storks Ephippiorhynchus asiaticus australis (adults, immatures and juveniles) and the food fed to nestlings in New South Wales. Storks walked or stood in water searching visually, or walked in water constantly probing […]

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FOOD OF WINTERING CATTLE EGRETS Ardea ibis

Posted: 10/04/2021
Author(s): D. G. GOSPER

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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SWIFTLET BEHAVIOUR RESPONSES TO PREDATORS IN PROXIMITY TO THEIR NESTS

Posted: 10/04/2021
Author(s): MICHAEL K. TARBURTON

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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