ISSN:0158-4197    

DOI:10.1071/MU9820001

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYWEAVER, C.M. 1982. Breeding habitats and status of the Golden-shouldered ParrotPsephotus chrysopterygius, in Queensland. Emu 82: 2–6.The breeding distribution and habitats of the Golden-shouldered ParrotPsephotus chrysopterygius, were surveyed from 1975 to 1979 to provide a guide for detailed studies. Breeding sites were found only north of the Morehead River and south from Musgrave Station on Cape York Peninsula. The habitat was drainage depressions with scattered termitaria and variable low open woodland communities. Nest tunnels were significantly more frequent in conical mounds, constructed byAmitermes? scopulus, than in meridian mounds, constructed byAmitermes laurensis;perhaps because temperatures fluctuated less in the conical mound. The Parrots were seen to feed on grasses (Panicum sp, SetariaandEragrostis) and were noted in small parties (6–10 birds) on three occasions, as eight pairs and as seven single birds.

ISSN:0158-4197    

DOI:10.1071/MU9820002

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYBELL, H.L. 1982. Social organization and feeding of the Rufous BabblerPomatostomus isidori.Emu 82: 7–11.Pomatostomus isidoriappears to behave similarly to Australian babblers, i.e. it forms permanent flocks that hold territories and roosts communally; the flock uses one nest at a time and all members of the flock appear to build the nest and feed young. The flock feeds as a unit and mainly frequents the lower understorey of rainforest.Pomatostomus isidoriassociates more often than not with other species, including three that mimic its coloration and calls. The species seem very sensitive to human activity.

ISSN:0158-4197    

DOI:10.1071/MU9820007

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYFORD, J. 1982. Origin, evolution and speciation of birds specialized to mangroves in Australia. Emu 82: 12–23.Australia has a fairly large number of species and subspecies of birds, mostly passerines, confined to or largely dependent on mangroves, a closed forest which occurs discontinuously as a narrow chain for thousands of kilometres along tropical and subtropical coasts. About twenty-five forms are mangrove specialists compared with about eleven in New Guinea. North-western Australia is especially rich in birds specialized to mangroves and it is suggested that this region has played an important role in their evolution: isolated populations of mesic species in refuges in north-western Australia apparently became dependent on mangroves as areas of rainforest and monsoonal forest shrank during past arid periods. No such mechanism was possible in New Guinea and northeastern Australia because large tracts of rainforest remained contiguous with mangroves throughout the Pleistocene. The area in which species and subspecies became specialized to mangroves has often become obscured by their subsequent expansion in range. Within the mangrove habitat of Australia and New Guinea, there have been one or two speciations and about twenty-five subspeciations mainly as a consequence of gaps in mangroves at the Eighty Mile Beach, western side of Joseph Bonaparte Gulf, Gulf of Carpentaria, Torres Strait and possibly the Burdekin Gap. A couple of subspeciations have resulted from gaps in range that may have been caused by competitors rather than by physical barriers. Patchy distributions and abrupt discontinuities in mangrove birds are discussed in terms of the island-like distribution of their habitat, exclusion by possible competitors, geographical barriers, floristic complexity of mangroves and dispersal ability.

ISSN:0158-4197    

DOI:10.1071/MU9820012

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYBELL, H.L. 1982. A bird community of lowland rainforest in New Guinea, I. Composition and density of the avifauna. Emu 82: 24–41.The birds in a plot of 2.5 ha of lowland rainforest at Brown River, Papua New Guinea were studied for two years. In the plot 165 species were recorded at an estimated density of 690 birds per 10 ha. Most species were sedentary and there were few migrants. Montane forms occurred as temporary visitors to fruiting or flowering trees, or as outliers of communities in nearby foothill forest. The proportion of frugivorous species is much higher than in other tropical regions, for which lack of mammalian competition is considered the main reason. The lowland avifauna of New Guinea is considered more a continental avifauna than a depauperate island one.

ISSN:0158-4197    

DOI:10.1071/MU9820024

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYJOSEPH, L. 1982. The Red-tailed Black-Cockatoo in south-eastern Australia. Emu 82: 42–45.A study was conducted into the conservation requirements of the isolated population of the Red-tailed Black-CockatooCalyptorhynchus magnificusin south-eastern South Australia and south-western Victoria. The range and status of the population are clarified and earlier suggestions of the population's dependence on Brown StringybarkEucalyptus baxteriare confirmed. An additional food source, BulloakCasuarina luehmanniiis reported. The population's breeding requirements are still poorly known. Clearing ofE. baxteriis the main threat to the population's existence.

ISSN:0158-4197    

DOI:10.1071/MU9820042

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

SUMMARYJOSEPH, L. 1982. The Glossy Black-Cockatoo on Kangaroo Island. Emu 82: 46–49.A study was conducted into the conservation requirements of the isolated population of the Glossy Black-CockatooCalyptorhynchus lathamion Kangaroo Island, South Australia. The population numbers at least 115 individuals and probably no more than 150. The number of breeding pairs is at least five but probably does not exceed thirty. The Cockatoos' favoured habitat occurs in steep to very steep gullies and gorges vegetated primarily with Sugar GumsEucalyptus cladocalyxand Drooping SheoaksCasuarina stricta.The core of the population's range is, at present, the North Coast west of Cape Cassini but this may change as Sheoaks on the Island's West Coast regenerate. The birds appear to feed only on the seeds of the Sheoak, these ace systematically extracted from the unopened cones of the female trees, specially the older ones. For nesting, the birds require tall eucalypts that are near food. There is a need for further research into the population's biology including its structure.

ISSN:0158-4197    

DOI:10.1071/MU9820046

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9820050

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9820053

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

ISSN:0158-4197    

DOI:10.1071/MU9820054

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor