Fauna of the Rio Grande Valleys — animals native to the 3 valley sections of the
Rio Grande−Rio Bravo, a major river in northeastern Mexico and the
United States.
The three ecologically distinct sections of the Rio Grande−Rio Bravoriver valleys are located in: western−central
New Mexico (U.S.); along the border of southwestern
Texas (U.S.) and northern
Chihuahua state (Mexico); and along the border in extreme southern Texas and northern
Tamaulipas state (Mexico), named the
Rio Grande Valley, to its
mouth at the
Gulf of Mexico.