. Bulletin of the British Ornithologists' Club. Alexander C. Lees & Carlos A. Peres 68 Bull. 2008 128(1) A range extension for Curl-crested Ara^ari Pteroglossus beauharnaesii: implications for avian contact zones in southern Amazonia by Alexander C. Lees & Carlos A. Peres Received 17 January 2007 The monotypic Curl-crested Ara^ari Pteroglossus beauharnaesii occurs south of the Amazon from northern Peru (south of the rio Marahon) and western Brazil (north-east to the mouth of the rio Madeira and south-east in a narrow tongue to the headwaters of the upper rio Xingu), and south to
. Bulletin of the British Ornithologists' Club. Alexander C. Lees & Carlos A. Peres 68 Bull. 2008 128(1) A range extension for Curl-crested Ara^ari Pteroglossus beauharnaesii: implications for avian contact zones in southern Amazonia by Alexander C. Lees & Carlos A. Peres Received 17 January 2007 The monotypic Curl-crested Ara^ari Pteroglossus beauharnaesii occurs south of the Amazon from northern Peru (south of the rio Marahon) and western Brazil (north-east to the mouth of the rio Madeira and south-east in a narrow tongue to the headwaters of the upper rio Xingu), and south to northern and central Bolivia in Pando and Cochabamba (Short & Horne 2002). Recent molecular analyses place it within the Red-necked Aragari P. bitorquatus species-group (Eberhard & Bermingham 2005). ACL visited the Novo Progresso region, southern Para, on 23-24 August 2006, to search for the enigmatic Golden-crowned Manakin Lepidothrix vilasboasi. At h on 23 August an adult P. beauharnaesii was observed departing a tree cavity in moderately disturbed terra firme forest west of Novo Progresso at °13'S, 55°32'W. The bird did not return within the next hour, perhaps indi- cating it was merely prospecting suitable nest sites. Subsequently that day, four P. beauhar- naesii were located with a mixed-species foraging flock of five P. bitorquatus reichenowi and three Black-necked Aragaris P. a. aracari in Cecropia trees in the same area. ACL obtained dig- ital images of one bird in poor light (Fig 1.). P. beauharnaesii was not recorded in this region by a recent survey (Pacheco & Olmos 2005), but the species is patchily distributed around Alta Floresta, northern Mato Grosso (Zimmer et al. 1997), and thus easily overlooked in rapid avifaunal surveys. These records are the first of P. beauharnaesii in Para north of the Serra do Cachimbo (a Cerrado region that serves as a fair- ly important faunal barrier to forest species), and a range exten- sion of 260 km north
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