Land clearing is the main threat to their survival.
He said land clearing killed about 7.5 million birds a year. Their next most deadly threats come from overgrazing by sheep and cattle, changes in fire patterns, agricultural activities, introduced predators and the growing loss of remnant vegetation in cleared areas. Queensland accounts for about 90 per cent of all Australia's land clearing. About 408,000 hectares were cleared last year, up 25 per cent over the previous year. About three-quarters of the area cleared was virgin vegetation.