excess of 30 years. Skimmers are a small family of tropical tern-like birds. They have an elongated lower mandible which they use to feed by flying low over the water surface and skimming the water for small fish. Black-legged kittiwake, Rissa tridactyla Red-legged kittiwake, Rissa brevirostris (A) Ivory gull, Pagophila eburnea Sabine's gull, Xema sabini Bonaparte's gull, Chroicocephalus philadelphia Black-headed gull, Chroicocephalus ridibundus Little gull, Hydrocoloeus minutus Ross's gull, Rhodostethia rosea Laughing gull, Leucophaeus atricilla Franklin's gull, Leucophaeus pipixcan Black-tailed gull, Larus crassirostris (A) Heermann's gull, Larus heermanni Common gull, Larus canus (A) LC Short-billed gull,Larus brachyrhynchus Ring-billed gull, Larus delawarensis Western gull, Larus occidentalis California gull, Larus californicus Herring gull, Larus argentatus Yellow-legged gull, Larus cachinnans (A) Iceland gull, Larus glaucoides Lesser black-backed gull, Larus fuscus Slaty-backed gull, Larus schistisagus (A) Glaucous-winged gull, Larus glaucescens 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) Aleutian tern, Onychoprion aleuticus (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 Common tern, Sterna hirundo Arctic tern, Sterna paradisaea Forster's tern, Sterna forsteri Royal tern, Thalasseus maximus (A) Sandwich tern, Thalasseus sandvicensis (A) Elegant tern, Thalasseus elegans (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) Red-tailed tropicbird, Phaethon rubricauda (A) Loons Order: GaviiformesFamily: Gaviidae Loons are aquatic birds the size of a large duck, to which they are unrelated. Their plumage is largely grey or black, and they have spear-shaped bills. Loons swim well and fly adequately, but, because their legs are placed towards the rear of the body, are almost helpless on land. Red-throated loon, Gavia stellata Arctic loon, Gavia arctica (A) Pacific loon, Gavia pacifica Common loon, Gavia immer Yellow-billed loon, Gavia adamsii Albatrosses Order: ProcellariiformesFamily: Diomedeidae The albatrosses are amongst the largest of flying birds, and the great albatrosses from the genus Diomedea have the largest wingspans of any extant birds. Yellow-nosed albatross, Thalassar chlororhynchus (A) Black-browed albatross, Thalassarche melanophris (A) Laysan albatross, Phoebastria immutabilis Black-footed albatross, Phoebastria nigripes Short-tailed albatross, Phoebastria albatrus Southern storm-petrels Order: ProcellariiformesFamily: Oceanitidae The storm-petrels