摘要:

SUMMARYLuders, D. J. 1977. Behaviour of Antarctic Petrels and Antarctic Fulmars before laying. Emu 77: 208–214.Antarctic PetrelsThalassoica antarcticaand Antractic FulmarsFulmarus glacialoidesnest in adjoining areas on Odbert and Ardery Islands, Wilkes Land, Antarctica. Observation of their arrival, nesting location, courtship displays and copulation revealed similarities but also some marked differences between the species. Antarctic Petrels deserted the nesting area before laying, whereas Antarctic Fulmars probably remained at their nests. The full sequence of arrival, courtship and copulation was much more compressed in the Antarctic Petrels than in the Fulmars. Courtship and copulation are described and discussed.

ISSN:0158-4197    

DOI:10.1071/MU9770208

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

摘要:

SUMMARYBeland, P. 1977. Mimicry in orioles of south-eastern Queensland. Emu 77: 215–218.Olive-backed Orioles and female Figbirds have quite similar plumages. Unlike other species, Orioles are not mobbed by Figbirds. The occurrence of small numbers of Orioles with flocks of Figbirds suggests that some type of Batesian mimicry may be involved, whereby Orioles share with Figbirds feeding sites unavailable to other species. At present, field observations are too limited to support any hypothesis but research on numbers, feeding preferences and behaviour of mixed flocks could provide an answer.

ISSN:0158-4197    

DOI:10.1071/MU9770215

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

摘要:

SUMMARYBarker, W. R., and J. R. Croft. 1977. The distribution of Macgregor's Bird-of-Paradise. Emu 77: 219–222.The presence ofMacgregoria pulchrais recorded for the first time from the subalpine regions of the Star Mountains of central New Guinea. This considerably reduces the gap between previous authenticated records of the bird's distribution. On the basis of known distribution, observations of the bird's behaviour and the distribution of local populations in the field it is postulated that the absence of the species from the many apparently suitable habitats in the central highlands of Papua New Guinea may be due to human predation.

ISSN:0158-4197    

DOI:10.1071/MU9770219

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

摘要:

SUMMARYSaunders, D. A. 1977. Breeding of the Long-billed Corella at Coomallo Creek, WA. Emu 77: 223–227.The breeding of the Long-billed Corelia was studied at Coomallo Creek between 1972 and 1976. During this period fifteen nests were studied and a total of twenty-eight young were fledged. Mean clutch size was 2.3 eggs and the mean size for the six eggs measured was 45.5×30.2 mm. The breeding season was found to be August to October and the incubation period twenty-four to twenty-nine days. Nine nestlings were measured and growth curves for three characters are given. The birds moved quite locally, to join birds from other nearby breeding areas and forage during the non-breeding season. Fledge-lings from Coomallo Creek left the nest with the lengths of their upper culmens within the range of that of the Little Corelia and this may be a source of confusion regarding the status of these two species in Western Australia.

ISSN:0158-4197    

DOI:10.1071/MU9770223

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9770228

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9770229

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9770230

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9770232

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9770236

出版商:Taylor&Francis    

年代:1977

数据来源: Taylor