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The Slender-billed Corella is known to use the "sentinel warning system" which employs alert birds warning flocks of approaching danger.
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Status in the Wild
World Population: Believed to be over 250,000.
Range: Found in SE Australia, from SE South Australia east to C Victoria and SW New South Wales. Introduced to urban centres in Australia and Tasmania.
Habitat: Found up to 400m (1312 ft). Favour tree-lined rivers and creeks running through farmland. In particular river red-gum and bull-oak trees favoured. Also occur in open forest, savanna woodland, farm pastures, paddocks and stubble fields. Not usually found far from water.
Threat Summary: Potentially trapping for wild bird trade and persecution by farmers; has declined somewhat. Also habitat loss and land-use changes. Population believed to be increasing, however.
IUCN Rating: Least concern
Wild Diet: Feed on corms, seeds, nuts, berries, roots, bulbs and insects and their larvae. Also may take sown grain and ripening crops.
CITES Rating: Appendix II
Ecology: Noisy and conspicuous. Roost in trees around water sources. Flocks of up to 2000 birds may gather, outside the breeding season, to use food sources. Feeds on the ground, rooting up different foods, getting soiled and dirty in the process. Fly noisily about before settling down for the evening to roost.
Clutch and Egg Size: 2 to 3 ovate eggs, 33.0 x 25.0mm (1.3 x 1 in).
Breeding Season: Most nesting occurs in September and October, although the season runs from July to December.
Links to Other Project(s): http://www.publish.csiro.au/paper/WR9860057.htm
http://www.publish.csiro.au/paper/MU9770223.htm
More Info Sites: http://www.birdsinbackyards.net/finder/display.cfm?id=101
http://en.wikipedia.org/wiki/Long-billed_Corella