干旱区生态环境知识资源中心

The Sierra Santa Rosa is part of a regional network of "sky island" mountain ranges in northern Coahuila. From 2004 to 2006, we made three visits to a site in the Sierra, Santa Rosa located at 880 in elevation on the eastern slope of a low-lying parallel range. We report a diverse avifauna uncharacteristic for the region, including a new breeding record for the Yellow-green Vireo (Vireo flavoviridis) in Coahuila and major breeding range extensions for the 1,east Grebe (Tachybaptus dominicus), Tropical Parula (Parula pitiayumi), Rufous-capped Warbler (Basileuterus. rufifrons), Flame-colored Tanager (Piranga bidentata), and Olive Sparrow (Arremonops rufivirgatus). This site. extends many elements of tropical, Sierra Madre, and Gulf Coast bird communities hundreds of kilometers to the north and east. These results emphasize the need for more bird surveys in the remote sky islands of northern Coahuila.