摘要:

SUMMARYDOW, D.D. and B.R. KING. 1984. Communal building of brood and roost nests by the Grey-crowned BabblerPomatostomus temporalis.Emu 84: 193–199.Observations were made on the times of building, the construction and use of nests for breeding and roosting by the communally breeding Grey-crowned BabblerPomatostomus temporalisin south-eastern Queensland.Activities were recorded at ten nests built by groups numbering from three to nine birds. The breeding pair of a group did more work than all other members, and the breeding female's contribution exceeded the breeding male's. Among auxiliary members, older birds did more work than younger ones. With increasing group size, the breeding female's visiting rate and her percentage contribution to building tended to remain constant, while the breeding male's rate and percentage decreased linearly. With increasing group size, the overall building rate of groups decreased slightly, possibly due to lack of co-ordination in the activities of larger groups, but mainly because of decreased effort by the primary male.Nests under construction were occasionally used as roosts; on completion, nests were used for either roosting or breeding, depending on the time of year. Nests used for breeding were afterwards used as roosts. Repeated repair of old nests caused these to become enlarged, but still of the same basic construction as new nests.Roles in building and in feeding nestlings are compared among birds of different social status. The differential effort of the primary female is most obvious.

ISSN:0158-4197    

DOI:10.1071/MU9840193

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

摘要:

SUMMARYPETER SMITH, 1984. The forest avifauna near Bega, New South Wales. I. Differences between forest types. Emu 84: 200–210.Ten major forest types were distinguished in the Bega-Bermagui region on the south coast of New South Wales:Acmenarainforest, coastalBanksia-Eucalyptusscrub, five types of matureEucalyptusforest, and three types of forest regenerating after intensive logging. A total of 123 bird species were recorded in these forests between 1977 and 1983. The bird communities of the rainforest and the coastal scrub were the most distinctive in that a number of species that were common in eucalypt forest were absent or rare. Among the various types of mature and regenerating eucalypt forest the major differences in birds were between the dry forests of the ridges and the moist forests of the gullies. Forest types with winter-floweringEucalyptusorBanksiaspecies attracted many honeyeaters and lorikeets at that season. In eucalypt forest 0–4 years after intensive logging many bird species were less frequent than in mature forest and few species were found breeding. There was no appreciable colonization of these logged areas (which were only 10–20 ha in size) by non-forest birds. In eucalypt forest 9–17 years after intensive logging the bird community more closely resembled that of mature forest.

ISSN:0158-4197    

DOI:10.1071/MU9840200

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

摘要:

SUMMARYWlNGHAM, E.J. 1984. Breeding biology of the Australasian GannetMorus senator(Gray) at Motu Karamarama, Hauraki Gulf, New Zealand II. Breeding success and chick growth. Emu: 84:211–224.Hatching and fledging success in the Atlantic, Cape and Australasian Gannets were found to be similar (74–82% and 92–97%) at colonies where human disturbance was minimal.Australasian Gannet chicks suffer most from bad weather when very young. They fledge at about 108 days compared with 97 days for Cape and 90 days for Atlantic Gannets. Age at fledging was found to decrease as the season progressed but this trend may be due to human disturbance.Chick weights and growth measurements of known-age chicks are given. Australasian Gannets reach peak weight later than the other two species, this is 132% of adult weight in Australasian and Atlantic Gannets and 124% in Cape Gannets. Plumage development is shown in photographs and described.

ISSN:0158-4197    

DOI:10.1071/MU9840211

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

摘要:

SUMMARYBELL, H.L. 1984. The importance of foothill forest in the diversity of rainforest birds in New Guinea. Emu 84: 225–235.The avifaunas of a lowland and a foothill rainforest near Port Moresby, Papua New Guinea, are compared. The foothill forest had the richer avifauna. It had many more forest species, but fewer species of secondary vegetation than did the lowland forest, and additionally a few species of mountain torrents. The foothill forest had as full a range of herbivorous species as did the lowland forest but in addition had more small species of both arboreal and terrestrial insectivorous passerines. Nine lowland species were replaced by closely-related species in the foothills. It is postulated that foothill forest is a distinct habitat in New Guinea, albeit small in total area, which has been largely overlooked, and that it posseses a distinct avifauna. The richness of this avifauna is attributable to the presence of both abundantly fruiting trees, characteristic of lowland forest, and also montane-type small-leaved trees which afford niches for small insectivores, plus a more dense leaf-litter than in lowland forest.

ISSN:0158-4197    

DOI:10.1071/MU9840225

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

摘要:

SUMMARYSIBLEY, C.G., R. SCHODDE, and J.E. AHLQUIST. 1984. The relationships of the Australo-Papuan treecreepers Climacteridae as indicated by DNA-DNA hybridization. Emu 84: 236–241.The technique of DNA-DNA hybridization was used to compare the nuclear DNAs of the Brown TreecreeperClimacteris picumnusand the Rufous TreecreeperClimacteris rufawith the DNAs of other passerine taxa. The treecreepers were found to be the descendants of the oldest dichotomy (ca. 45–48 MYA) in the superfamily Menuroidea, a group that also includes the lyrebirds, scrub-birds, and bowerbirds. We recognize the family Climacteridae, superfamily Menuroidea, parvorder Corvi, suborder Passeres. Within the Climacteridae we recognize two genera,Climacterisfor the speciespicumnus, rufa, melanura, erythrops, andaffinis, andCormobatesforleucophaea(includingminor) andplacens.

ISSN:0158-4197    

DOI:10.1071/MU9840236

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9840242

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9840243

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9840244

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9840246

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9840248

出版商:Taylor&Francis    

年代:1984

数据来源: Taylor