The long, narrow islands, which lie about 10 miles offshore, are moving slowly but inexorably westward each year as the forces of wind and waves that created them transfer sand from eastern tips to western ends. Dunes dotted with sea oats, salt grass and pennywort line their shores, and there are extensive marsh areas with lagoons. Inland vegetation includes bush goldenrod, live oak, palmetto, prickly pear and slash pine.
The islands are designated wilderness areas; the resident wildlife includes snakes, alligators, raccoons and rabbits. Terns, herons and egrets are among the more than 300 species of birds that have been documented. Horn, Petit Bois, Cat and East Ship islands are open to wilderness camping and are accessible by private or licensed charter boat.
The Davis Bayou Area is entered off US 90 east of Ocean Springs. It contains the Mississippi District Seashore headquarters, the William M. Colmer Visitor Center and such recreational facilities as a boat launch, a fishing pier, a nature trail, boardwalks and the 51-site Davis Bayou Campground. Seasonal ranger programs take place on weekends. The visitor center is open daily 8:30-4:30. Closed Jan. 1 and Christmas. Phone (228) 875-9057. The chamber of commerce in Ocean Springs can provide information about guided kayaking tours; phone (228) 875-4424.
For further information, contact the Superintendent, Gulf Islands National Seashore, 3500 Park Rd., Ocean Springs, MS 39564; phone (228) 875-9057.