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Sexual Dimorphism in the Blue Bonnet

Category: Issue 1
Author(s): Joseph
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A plumage character traditionally regarded as a subspecilic character of the so-calfed Red-vented Blue Bonnet Northiella haematogaster haematorrhous actually occurs most prominently in males of eastern populations of N. haematogaster, ie. generally, those east of 147E. lt is readily observable in the field.

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DIURNAL AND SEASONAL CHANGES IN AGGRESSION IN A HONEYEATER COMMUNITY

Category: Issue 1
Author(s): McFarland
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Aggression within a honeyeater community was examined on both diurnal and seasonal scales over a period of one year. Aggression was more common in the morning and afternoon than at midday. Honeyeaters were most abundant during the flowering ol two banksias.  Most aggressive interactions were recorded during these months. lt is suggested that the level […]

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THE IMPACT OF URBAN DEVELOPMENT ON BIRD COMMUNITIES OF THREE VICTORIAN TOWNS – LILYDALE, COLDSTREAM AND MT EVELYN

Category: Issue 1
Author(s): Mason
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During 1982 an avifauna census was conducted in the outer Melbourne areas of Lilydale, Coldstream and Mt Evelyn, Victoria. Data were collected along foot transects at nine different sites. The siles were chosen to give a range of residential ages. from predeveloped (before housing development had started) through to some of the oldest residential areas […]

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THE RELIABILITY OF ESTIMATES OF DENSITY FROM TRANSECT COUNTS

Category: Issue 1
Author(s): Bell and Ferrier
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Densities were estimaled from transect counts for seven species at Wollomombi, New South Wales. These esiimates are compared with accurate densities derived from intensive studies of colour-banded birds. Also estimates of density of the Golden-headed Cisticola Cisticola exilis, at Port Moresby, Papua New Guinea, are compared with seasonal changes in behaviour of that species. Three […]

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