Acanthiza uropygialis

Chestnut-rumped thornbills posturing, (sequence of 5 photos in less than 2 seconds, Sturt Desert, NSW). The chestnut-rumped thornbill (Acanthiza uropygialis) is a small passerine bird in the family Acanthizidae, endemic to Australia. Specially named for its pale-chestnut rump from mediaeval Latin uropygium, the rump.Higgins, P. J., & Peter, J. M. (Eds.). (2002). Handbook of Australian, New Zealand and Antarctic Birds (Vol. 6, pp. 468-478). Melbourne: Oxford University Press. Its other names include chestnut-tailed or chestnut-backed thornbill, tit or tit-warbler, chestnut-rumped tit or tit-warbler. A plain, pale thornbill, with pale eyes, it is widespread throughout inland Australia, west of the Great Dividing Range to the West Australian coast but is absent in the far north and humid southwestern WA.Pizzey, G., & Knight, F. (2012). The field guide to the birds of Australia (S. Pizzey Ed. 9 ed.). Sydney: Harper Collins. It is a cooperative breeder like some of the other thornbills Nicholls, J. A., Double, M. C., Rowell, D. M., & Magrath, R. D. (2000). The evolution of cooperative and pair breeding in thornbills Acanthiza (Pardalotidae). Journal of Avian Biology, 31, 165-176. doi: 10.1034/j.1600-048X.2000.310208.x

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