In western New South Wales, the relative abundance of both diurnal birds of prey and house mice was monitored at frequent intervals over a three-year period. The abundance of mouse-eating raptors was positively correlated with that of house mice, and these birds appeared to be responding to changes in mouse abundance. This suggests that the […]
Waterbirds were counted on 10 farm dams (1.2 to 25 x 103 m2 maximum surface area) in south-east Queensland on 20 days from May 1980 through October 1982. Dams were 10 to 30 years old. Seventeen species (3 960 observations) of open-water birds and 14 shoreline species (224 observations) were observed. More than 2.3 individuals […]
Winter swamp, 7 km west of Ballarat, was improved as a wetland to encourage breeding birds. Islands, created to enhance the habitat for birds, were quickly colonised by breeding Silver Gulls. Revegetation with trees and shrubs on some islands reduced the breeding population of gulls. Lowest gull nest densities occurred on bare areas and beneath […]
White-browed Scrub-wrens have been banded at New Chums Road in the Brindabella Range, Australian Capital Territory since 1961, as part of a larger bird-banding study. Adult White-browed Scrub-wrens were sedentary, and during the period 1961-82 their mean annual survival rate was 65 per cent. This compares with an annual survival of 77 per cent for […]
