Parasitic jaeger, Stercorarius parasiticus Long-tailed jaeger, Stercorarius longicaudus Gulls, terns, and skimmers Order: CharadriiformesFamily: Laridae Laridae is a family of medium to large seabirds and includes gulls, terns, kittiwakes, and skimmers. They are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Black-legged kittiwake, Rissa tridactyla (A) Sabine's gull, Xema sabini (A) Bonaparte's gull, Chroicocephalus philadelphia Black-headed gull, Chroicocephalus ridibundus Little gull, Hydrocoloeus minutus (A) Laughing gull, Leucophaeus atricilla (A) Franklin's gull, Leucophaeus pipixcan Heermann's gull, Larus heermanni (A) Short-billed gull, Larus brachyrhynchus (A) Ring-billed gull, Larus delawarensis California gull, Larus californicus Herring gull, Larus argentatus Iceland gull, Larus glaucoides (A) Lesser black-backed gull, Larus fuscus (A) Glaucous-winged gull, Larus glaucescens Glaucous gull, Larus hyperboreus (A) Great black-backed gull, Larus marinus (A) Sooty tern, Onychoprion fuscatus (A) Least tern, Sternula antillarum Caspian tern, Hydroprogne caspia Black tern, Chlidonias niger Common tern, Sterna hirundo Arctic tern, Sterna paradisaea (A) Forster's tern, Sterna forsteri Royal tern, Thalasseus maximus (A) 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 (A) Pacific loon, Gavia pacifica (A) 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. Jabiru, Jabiru mycteria (A) 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 Great frigatebird, Fregata minor (A) 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.