gull, Larus glaucescens Glaucous gull, Larus hyperboreus Great black-backed gull, Larus marinus Kelp gull, Larus dominicanus Sooty tern, Onychoprion fuscatus Least tern, Sternula antillarum Caspian tern, Hydroprogne caspia Black tern, Chlidonias niger Common tern, Sterna hirundo Arctic tern, Sterna paradisaea Forster's tern, Sterna forsteri Royal tern, Thalasseus maximus Sandwich tern, Thalasseus sandvicensis Black skimmer, Rynchops niger Loons Order: GaviiformesFamily: Gaviidae Loons are aquatic birds the size of a large duck, to which they are unrelated. Their plumage is largely gray or black, and they have spear-shaped bills. Loons swim well and fly adequately, but are almost hopeless on land, because their legs are placed towards the rear of the body. Red-throated loon, Gavia stellata Arctic loon, Gavia arctica Pacific loon, Gavia pacifica Common loon, Gavia immer Yellow-billed loon, Gavia adamsii Storks Order: CiconiiformesFamily: Ciconiidae Storks are large, heavy, long-legged, long-necked wading birds with long stout bills and wide wingspans. They lack the powder down that other wading birds such as herons, spoonbills, and ibises use to clean off fish slime. Storks lack a pharynx and are mute. Wood stork, Mycteria americana Frigatebirds Order: SuliformesFamily: Fregatidae Frigatebirds are large seabirds usually found over tropical oceans. They are large, black, or black-and-white, with long wings and deeply forked tails. The males have colored inflatable throat pouches. They do not swim or walk and cannot take off from a flat surface. Having the largest wingspan-to-body-weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week. Magnificent frigatebird, Fregata magnificens Boobies and gannets Order: SuliformesFamily: Sulidae The sulids comprise the gannets and boobies. Both groups are medium-large coastal seabirds that plunge-dive for fish. Brown booby, Sula leucogaster Anhingas Order: SuliformesFamily: Anhingidae Anhingas are cormorant-like water birds with very long necks and long, straight beaks. They are fish eaters which often swim with only their neck above the water. Anhinga, Anhinga anhinga Cormorants and shags Order: SuliformesFamily: Phalacrocoracidae Cormorants are medium-to-large aquatic birds, usually with mainly dark plumage and areas of colored skin on the face. The bill is long, thin, and sharply hooked. Their feet are four-toed and webbed. Double-crested cormorant, Nannopterum auritum Neotropic cormorant, Nannopterum brasilianum Pelicans Order: PelecaniformesFamily: Pelecanidae Pelicans are very large water birds with a distinctive pouch under their bills. Like other birds in the order Pelecaniformes, they have four webbed toes. American white pelican, Pelecanus erythrorhynchos Brown pelican, Pelecanus occidentalis Herons, egrets,