The Great Texas Coastal Birding Trail is a state-designated system of trails, bird sanctuaries, and nature preserves along the entire length of the Texas Gulf Coast in the United States. As the state of Texas hosts more bird species than any other state in the U.S. the trail system offers some of the most unusual opportunities for bird-watching in the world. The "trail" is actually 43 separate hiking and driving trails that include 308 birding sites. The sites themselves feature a variety of viewing opportunities with boardwalks, observation decks, and other amenities. The trails boast more than 450 bird species. The trail system is managed by the Texas Parks and Wildlife Department as part of the Great Texas Wildlife Trails which also include the Heart of Texas Wildlife Trail, the Panhandle Plains Wildlife Trail, and the Prairies and Pineywoods Wildlife Trail.

Aransas National Wildlife Refuge is a 115,324-acre (466.7 km2) protected area situated on the southwest side of San Antonio Bay along the Gulf Coast of the U.S. state of Texas. It is located in parts of Aransas, Refugio, and Calhoun Counties. It is situated on the southwest side of the San Antonio Bay, formed by the mouth of the Guadalupe River. It also includes nearly the entirety of Matagorda Island, a 38-mile barrier island. The Aransas National Wildlife Refuge was established by Executive Order 7784 on 31 December 1937 by President Franklin D. Roosevelt as the Aransas Migratory Waterfowl Refuge as a refuge and breeding ground for migratory birds and other wildlife. Roosevelt issued a proclamation in 1940 changing the name to the Aransas National Wildlife Refuge.