Mammals:
* Marine mammals: Dolphins, whales (especially migrating species), seals, sea lions (in some areas)
* Land mammals: Deer, rabbits, raccoons, opossums, foxes, squirrels, armadillos, various rodents
* Coastal mammals: Sea otters (in certain locations), manatees (in warm waters), walruses (in Arctic areas)
Birds:
* Shorebirds: Sandpipers, plovers, gulls, terns, oystercatchers, willets, dowitchers, sanderlings
* Waterfowl: Ducks, geese, swans, herons, egrets, ibises
* Raptor birds: Hawks, eagles, owls
* Seabirds: Pelicans, cormorants, albatrosses (in specific regions), puffins (in some areas)
Reptiles and Amphibians:
* Reptiles: Sea turtles (nesting on beaches), snakes (including venomous species), lizards, alligators (in some areas), crocodiles (in some areas)
* Amphibians: Frogs, toads, salamanders
Fish:
* Marine fish: Numerous species, including those found in estuaries, reefs, and open ocean
* Estuarine fish: Flounder, drum, mullet, redfish, snook, striped bass
Invertebrates:
* Crustaceans: Crabs, shrimp, lobsters, barnacles
* Mollusks: Clams, oysters, mussels, snails
* Insects: Beetles, ants, flies, butterflies
Important Note: Specific animal species found on barrier islands vary widely depending on the location's geographical region, climate, and ecosystem.
For a more detailed list of animals for a particular barrier island, you can search online for "wildlife on [island name]" or consult with a local nature center or park ranger.