Range extensions of birds in southeastern Amazonia

We report range extensions of Caprimulgus sericocaudatus, Automolus ochrola emus, Dichrozona cincta, Poecilotriccus andrei, Ramphotrigon fuscicauda, Ra mphotrigon megacephala, Turdus lawrencii, and Euphonia chrysopasta for Pink aiti and Gorotire, east of the Xingu River, southeastern Para State, Brazil . The distributional status of the following species in southeastern Amazon ia is also discussed: Nonnula ruficapilla, Synallaxis cherriei, and Simoxen ops ucayalae. The new records we report suggest that the patchy distributio n of some birds in eastern Amazonia, such as species associated with bamboo , can be explained by a complex mosaic of habitats at the eastern and south ern fringes of the Amazonian basin. The range extensions we report demonstr ate that areas inventoried a long time ago, before an emphasis on vocal ide ntification of species, and assumed to be "well known", can in fact turn ou t to be ornithologically undersampled.