grey or brown plumage, often with white markings on the wings. They have longish bills with hooked tips and webbed feet with sharp claws. They look like large dark gulls, but have a fleshy cere above the upper mandible. They are strong, acrobatic fliers. Great skua, Stercorarius skua (A) South polar skua, Stercorarius maccormicki Pomarine jaeger, Stercorarius pomarinus Parasitic jaeger, Stercorarius parasiticus Long-tailed jaeger, Stercorarius longicaudus (A) Auks, murres, and puffins Order: CharadriiformesFamily: Alcidae Alcids are superficially similar to penguins due to their black-and-white colours, their upright posture, and some of their habits, however they are only distantly related to the penguins and are able to fly. Auks live on the open sea, only deliberately coming ashore to nest. Dovekie, Alle alle Common murre, Uria aalge Thick-billed murre, Uria lomvia Razorbill, Alca torda Great auk, Pinguinus impennis Black guillemot, Cepphus grylle Atlantic puffin, Fratercula arctica 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 grey or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Black-legged kittiwake, Rissa tridactyla Ivory gull, Pagophila eburnea (A) Sabine's gull, Xema sabini (A) Bonaparte's gull, Chroicocephalus philadelphia Black-headed gull, Chroicocephalus ridibundus Little gull, Hydrocoleus minutus (A) Ross's gull, Rhodostethia rosea (A) Laughing gull, Leucophaeus atricilla (A) Franklin's gull, Leucophaeus pipixcan (A) Black-tailed gull, Larus crassirostris (A) Common gull, Larus canus (A) Short-billed gull, Larus brachyrhynchus (A) Ring-billed gull, Larus delawarensis California gull, Larus californicus (A) Herring gull, Larus argentatus Iceland gull, Larus glaucoides Lesser black-backed gull, Larus fuscus Slaty-backed gull, Larus schistisagus (A) Glaucous gull, Larus hyperboreus Great black-backed gull, Larus marinus Kelp gull, Larus dominicanus (A) Sooty tern, Onychoprion fuscatus (A) Bridled tern, Onychoprion anaethetus (A) Least tern, Sternula antillarum (A) Gull-billed tern, Gelochelidon nilotica (A) Caspian tern, Hydroprogne caspia Black tern, Chlidonias niger White-winged tern, Chlidonias leucopterus (A) Roseate tern, Sterna dougallii Arctic tern, Sterna paradisaea Forster's tern, Sterna forsteri (A) Royal tern, Thalasseus maximus (A) Sandwich tern, Thalasseus sandvicensis (A) Black skimmer, Rynchops niger (A) Tropicbirds Order: PhaethontiformesFamily: Phaethontidae Tropicbirds are slender white birds of tropical oceans with exceptionally long central tail feathers. Their long wings have black markings, as does the head. White-tailed tropicbird, Phaethon lepturus (A) Red-billed tropicbird, Phaethon aethereus (A) Loons Order: GaviiformesFamily: Gaviidae Loons are aquatic birds, the size of a