Sundown Island Sanctuary, also locally known as  Bird Island, is a low-lying, seventy-acre island built from dredge spoil in 1962.  It is located near where the Matagorda Ship Channel and the Gulf Intracoastal Waterway cross in Matagorda Bay, east of Port O'Connor and southeast of Port Lavaca, in the Texas' coastal bend.

The Island is leased from the General Land Office and managed by the National Audubon Society's Texas Coastal Sanctuaries program, as part of the Society's 13,000-acre network of 33 islands that stretch from Mexico to Louisiana. 

For additional views of the Sundown Island, click on the links below.