We present a list of the avifauna of a Tamaulipan thornscrub area in Tamaulipas, Mexico. We found 171 species grouped
into 42 families, from 1999 to 2005. The most well represented families were Anatidae (21 species), Accipitridae (17) and
Emberizidae (13). Ninety one species were residents and 80 were migrants. Tamaulipan thornscrub provides sanctuary
zones, nesting, feeding, rest as much for the resident bird species as migratory. This study is a contribution for the
knowledgement of the birds associated to Tamaulipan thornscrub and northeastern region of Tamaulipas, adding two
species to the inventory for this region.