white, often with black markings on the head or wings. They have longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water. Terns are generally long-lived birds, with several species known to live in excess of 30 years. Sabine's gull, Xema sabini (V) Brown-hooded gull, Chroicocephalus maculipennis Gray-hooded gull, Chroicocephalus cirrocephalus Black-headed gull, Chroicocephalus ridibundus (V) Gray gull, Leucophaeus modestus (V) Laughing gull, Leucophaeus atricilla Franklin's gull, Leucophaeus pipixcan (V) Olrog's gull, Larus atlanticus Ring-billed gull, Larus delawarensis (V) Kelp gull, Larus dominicanus Lesser black-backed gull, Larus fuscus (V) Brown noddy, Anous stolidus Black noddy, Anous minutus White tern, Gygis alba Sooty tern, Onychoprion fuscata Least tern, Sternula antillarum Yellow-billed tern, Sternula superciliaris Large-billed tern, Phaetusa simplex Gull-billed tern, Gelochelidon nilotica Black tern, Chlidonias niger White-winged tern, Chlidonias leucopterus (V) Common tern, Sterna hirundo Roseate tern, Sterna dougallii Arctic tern, Sterna paradisaea South American tern, Sterna hirundinacea Antarctic tern, Sterna vittata (V) Snowy-crowned tern, Sterna trudeaui Sandwich tern, Thalasseus sandvicensis Royal tern, Thalasseus maximusSunbittern Order: EurypygiformesFamily: Eurypygidae The sunbittern is a bittern-like bird of tropical regions of the Americas and the sole member of the family Eurypygidae (sometimes spelled Eurypigidae) and genus Eurypyga. Sunbittern, Eurypyga heliasTropicbirds Order: PhaethontiformesFamily: Phaethontidae Tropicbirds are slender white birds of tropical oceans, with exceptionally long central tail feathers. Their heads and long wings have black markings. Red-billed tropicbird, Phaethon aethereus Red-tailed tropicbird, Phaethon rubricauda (V) White-tailed tropicbird, Phaethon lepturusPenguins Order: SphenisciformesFamily: Spheniscidae The penguins are a group of aquatic, flightless birds living almost exclusively in the Southern Hemisphere. Most penguins feed on krill, fish, squid, and other forms of sealife caught while swimming underwater. King penguin, Aptenodytes patagonicus (V) Magellanic penguin, Spheniscus magellanicus Macaroni penguin, Eudyptes chrysolophus (V) (vulnerable) Rockhopper penguin, Eudyptes chrysocome (V) (vulnerable) Albatrosses Order: ProcellariiformesFamily: Diomedeidae The albatrosses are among the largest of flying birds, and the great albatrosses from the genus Diomedea have the largest wingspans of any extant birds. Royal albatross, Diomedea epomophora Wandering albatross, Diomedea exulans Sooty albatross, Phoebetria fusca (endangered) Light-mantled albatross, Phoebetria palpebrata Yellow-nosed albatross, Thalassarche chlororhynchos Black-browed albatross, Thalassarche melanophris Gray-headed albatross, Thalassarche chrysostoma (V) (endangered) White-capped albatross, Thalassarche cauta (V) (near-threatened) Southern storm-petrels Order: ProcellariiformesFamily: Oceanitidae The storm-petrels are the smallest