Assateague Island - Fauna

Fauna

Large populations of birds inhabit the island, including American Oystercatcher, Great Blue Heron, and Snowy Egret. There are over 320 species that are known to inhabit the island during some portion of the year. These include gulls, terns, and other shorebirds along with raptors, waterbirds, and waterfowl. The Piping Plover is a notable endangered species that nests on Assateague.

The feral horse population of Assateague Island is alternately known as the Assateague horse in Maryland and the Chincoteague Pony in Virginia. This distinction, made both on per-breed and per-individual basis, is sometimes a matter of disagreement. The traditional definition of a horse or a pony is based on whether the animal in question falls over or under 14.2 hands (58 inches, 147 cm). The equines on the island tend to be under 14.2, but have a horse phenotype. It is argued that their relatively small size is primarily due to environmental, rather than genetic conditions. The National Park Service provides information about these animals through brochures and the internet.

The Maryland and Virginia horses are kept apart by fencing at the border between the two states. Though commonly called "wild," these horses had domesticated ancestors, claimed in legend to be survivors of a Spanish galleon that shipwrecked along the coast, but possibly just local colonial horses allowed to run loose. When excess numbers are removed from the island and they are placed into human ownership, they adapt quickly to domestication. Made famous by Marguerite Henry in her children's book Misty of Chincoteague, the animals are popular tourist attractions and subjects for photography.

The Maryland horses are owned and managed by the National Park Service, who have carefully followed the population over generations. In Virginia, the Chincoteague ponies are owned by the Chincoteague Volunteer Fire Department. Once a year in July, the local "salt water cowboys" round them up and sort a number of animals to be removed from the island, which are put up for auction on Pony Penning Day. To keep their numbers under control on the Maryland side, a federal contraceptive program has been in place since 1994. In Virginia, the Pony Penning Days auction keeps the horse population at levels required by agreement with the Chincoteague National Wildlife Refuge.