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Australian swiftlet : ウィキペディア英語版 | Australian swiftlet
The Australian swiftlet (''Aerodramus terraereginae'') is a small bird belonging to the genus ''Aerodramus'' in the swift family, Apodidae. It is endemic to Queensland in north-eastern Australia. It was formerly included in the white-rumped swiftlet (''Aerodramus spodiopygius'') but is now commonly treated as a separate species. It has two subspecies which are occasionally regarded as two separate species: ''A. t. terraereginae'' and ''A. t. chillagoensis'' (Chillagoe swiftlet). ==Description== It is 11-12 centimetres long with a wing length of 107-118.2 millimetres and a weight of 10.5-12.5 grams. The upperparts are dark grey-brown while the underparts are a uniform greyish. There are pale feathers on the forehead and lores. The rump is normally pale greyish but can occasionally be darker. The tail is slightly forked. The form ''chillagoensis'' is smaller and paler with a weight of around 9.39 grams. It has a high-pitched flight call. In its breeding caves, it utters a metallic clicking call, used for echolocation.
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