Rio Grande Joint Venture

Content © Rio Grande Joint Venture 2015                                                                                                      Contact the RGJV

The Tamaulipan Brushlands Bird Conservation Region extends from south Texas to portions of Tamaulipas, Nuevo Leon, and Coahuila.  The entire BCR is within the Rio Grande Joint Venture region.  The Tamaulipan Brushlands are generally flat to gently rolling with higher hills and cliffs along the Rio Grande.  Native havitat is a dense growth of low to medium thorny trees, and cacti.  In some areas live oak woodlands are interspersed with grasslands and savanna environments.


The Rio Grande Joint Venture’s top priority bird habitat in the Tamaulipan Brushlands is riparian corridor followed by grasslands.  

Tamaulipan Brushlands

Opportunities and Threats

Riparian and woodland ecosystems in the Tamaulipan Brushlands are fragmented and altered on both sides of the Rio Grande.   

Priority habitats in the  Tamaulipan Brushlands are riparian corridor and grasslands.  Tall riparian woodlands cross an arid plain along the Nueces, Frio, Rio Grande, San Fernando, San Juan, and Salado rivers. Riparian and scrub forests along the Rio Grande and other rivers blend together with taller vegetation near the river blending into the surrounding drier flood plain. Riparian corridors like the Rio Grande create an important wildlife corridor from Falcon Dam to the mouth of the river.  The dense forest is diverse with many fruit producing trees and abundant epiphytes including ball moss and spanish moss.  

Lack of flooding to bring nutrient-rich waters to the floodplain and over-allotment of river water are both issues impacting the limited remaining riparian corridor.  


Grasslands challenges include shrub encroachment and replacement of natives with non-native non-seeding species invasive species as livestock forage. Native grasslands and savannahs have often been replaced with a mixture of trees and invasive species. Fragmentation, inappropriate grazing management, and drought all have impacted native grasslands.