Resaca de la Palma State Park is one of three state parks belonging to the World Birding Center and managed by the Texas Parks and Wildlife Department. At 1,200 acres, Resaca de la Palma State Park is the largest of the World Birding Center sites and is located in Brownsville. The property was acquired by the Texas Parks and Wildlife Department in 1977 and was opened to the public in December 2008. A resaca is a type of oxbow lake that can be found in Texas, and is a former channels of the Rio Grande. It is naturally cut off from the river, having no inlet or outlet.