Laguna Atascosa National Wildlife Refuge is the largest protected area of natural habitat left in the Lower Rio Grande Valley. The 65,096-acre (263.43 km2) refuge is located in Cameron County, Texas near Harlingen, Texas. It is a nesting ground for the endangered Least Tern and nine other endangered or threatened species, including rare wild cats, the ocelot and jaguarundi. Programs at the refuge include vegetation and wetland restoration.