Jeff Vanuga / Aerial view of Grand Prismatic Springs Midway Geyser Basin. Yellowstone National Park, Wyoming, July 2011.

Aflo / Black footed albatross (Phoebastria nigripes) pair displaying, Midway Islands, USA

Sebastian Kennerknecht / White Tern (Gygis alba) flying over beach, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) chick, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Michael Pitts / Aerial view of runways on Sand Island, Midway Islands, Pacific

Michael Pitts / Shoal of Hawaiian squirrelfish {Sargocentron xantherythrum}, Midway Islands, Pacific

Tim Fitzharris / Tourists viewing Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) pair bonding, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) pair bonding, Midway Atoll, Hawaii

Tui De Roy / White Tern (Gygis alba) hovering in search of nest site, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) taking off from beach, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) walking with typical hunched gait, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) incubating single egg, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) courtship dance, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) courtship dance, Midway Atoll, Hawaii

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) courtship dance, Midway Atoll, Hawaii

Jim Brandenburg / Aerial view of Grand Prismatic Pool in winter, Midway Geyser Basin, Yellowstone National Park, Wyoming

Michael Pitts / Eastern Island, Midway Islands, Pacific ocean. Showing runways used in World War II.

Michael Pitts / Three Black footed albatross {Phoebastria nigripes} Midway Atoll, Pacific

Michael Pitts / Laysan albatross display (Phoebastria immutabilis) Midway Atoll Pacific

Michael Pitts / Laysan albatross display (Phoebastria immutabilis) Sand Is Midway Atoll Pacific

Michael Pitts / Red tailed tropic bird flying, Midway Atoll, Pacific Ocean

Michael Pitts / Red tailed tropic bird with chick, Midway Atoll, Pacific Ocean

Michael Pitts / Red tailed tropic bird adult with chick, Midway Atoll, Pacific Ocean

Michael Pitts / Laysan albatross feeding chick {Diomedea immutabalis} Midway Atoll, Pacific Ocean

Hermann Brehm / Grand Prismatic Spring in Midway Geyser Basin, Yellowstone NP, Wyoming, USA.

Michael Pitts / Hawaiian monk seal pair courting off Midway Atoll,Pacific Ocean

Jeff Vanuga / Aerial view of Grand Prismatic Springs Midway Geyser Basin. Yellowstone National Park, Wyoming, July 2011.

Ingo Arndt / Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Ingo Arndt / Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Ingo Arndt / Tourists viewing Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Ingo Arndt / Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Peter Cairns / Tourists silhouetted on boardwalk at Midway Geyser Basin. Yellowstone National Park, Wyoming, USA, September.

Kevin Schafer / Black-footed albatross, (Phoebastria / Diomedea nigripes) Midway Atoll, northeast Hawaiian Island, Pacific ocean

Michael Pitts / Red tailed tropic bird {Phaethon rubricauda} portrait, Midway Atoll, Pacific

Michael Pitts / Laysan albatross (Phoebastria immutabilis) juvenile flying, Midway Atoll, Pacific

Michael Pitts / Laysan albatross pair (Phoebastria immutabilis) Midway Atoll, Pacific

Aflo / Pod of Hawaiian / Long snouted / Gray's spinner dolphins (Stenella longirostris longirostris) just below the surface, Midway Islands, Pacific Ocean, USA

Aflo / Laysan albatross (Phoebastria immutabilis) chick, Midway Islands, USA

Aflo / Two Indian Ocean White Terns (Gygis alba candida) one grooming the other on branch, Midway Islands, Pacific Ocean, USA

Aflo / Green sea turtle (Chelonia mydas) on beach, Midway Islands, Pacific Ocean, USA

Aflo / Two Indian Ocean White Terns (Gygis alba candida) one sleeping, Midway Islands, Pacific Ocean, USA

Aflo / Laysan albatross (Phoebastria immutabilis) pair, Midway Islands, USA

Aflo / Laysan albatross (Diomedia immutabilis) pair with chick at nest, Midway Islands, USA

Aflo / Indian Ocean White Tern (Gygis alba candida) with wings outstretched and chick on nearby branch, Midway Islands, Pacific Ocean, USA

Aflo / Two Indian Ocean White Terns (Gygis alba candida) one grooming the other, Midway Islands, Pacific Ocean, USA

Aflo / Black footed albatross (Phoebastria nigripes) on nest, Midway Islands, USA

Aflo / Hawaiian monk seal (Monachus schauinslandi) lying on beach, Midway Islands, USA

Aflo / Black footed albatross (Phoebastria nigripes) pair in courtship, Midway Islands, USA

Aflo / Hawaiian monk seal (Monachus schauinslandi) lying in shallow water, Midway Islands, USA

Aflo / Laysan albatross (Phoebastria immutabilis) pair at nest site, Midway Islands, USA

Aflo / Black footed albatross (Phoebastria nigripes) pair in courtship, Midway Islands, USA

Aflo / Four Hawaiian / Long snouted / Gray's spinner dolphins (Stenella longirostris longirostris) just below the surface, Midway Islands, Pacific Ocean, USA

Michael Pitts / Galapagos shark {Carcharhinus galapagensis} with small fish swimming alongside, Midway Is, Pacific ocean

Yva Momatiuk & John Eastcott / Excelsior Geyser Crater steaming, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Excelsior Geyser Crater steaming, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Excelsior Geyser Crater steaming, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Clouds reflected in the Opal Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Tourists photgraphing Opal Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / Opal Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Sebastian Kennerknecht / White Tern (Gygis alba) flying, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) flying, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) flying, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) flying, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / Red-tailed Tropicbird (Phaethon rubricauda) flying, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba), Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / Red-tailed Tropicbird (Phaethon rubricauda) with chick, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / Red-tailed Tropicbird (Phaethon rubricauda) with chick, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) pair, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) in tree, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / Red-tailed Tropicbird (Phaethon rubricauda) nesting, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba), Midway Atoll, Hawaiian Leeward Islands, Hawaii

Sebastian Kennerknecht / White Tern (Gygis alba) in tree, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Kevin Schafer / Short-tailed Albatross (Phoebastria albatrus), single bird re-colonizing Midway Atoll, Hawaii

Kevin Schafer / Laysan Albatross (Phoebastria immutabilis) parent feeding chick beside fire hydrant, Midway Atoll, Hawaii

Kevin Schafer / Island Canary (Serinus canaria) drinking from leaky faucet, Midway Atoll, Hawaii

Kevin Schafer / White Tern (Gygis alba) chick, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Tui De Roy / White Tern (Gygis alba) pair mating, Midway Atoll, Hawaii

Kevin Schafer / Spinner Dolphin (Stenella longirostris) trio, Midway Atoll, Hawaiian Leeward Islands, Hawaii

Jeff Vanuga / Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA

Jeff Vanuga / Aerial view of the Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA

Jeff Vanuga / Excelsior Geyser spilling over 4000 gallons per minute of boiling water into the Firehole River (far right), Midway Geyser Basin, Yellowstone National Park, Wyoming, USA (It is considered to be the la...

Michael Pitts / Sand island, main runway for Midway, Pacific Ocean.

Michael Pitts / Scorpion leaf fish {Scorpaenidae} Midway Atoll, Midway Islands

Yva Momatiuk & John Eastcott / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming

Michael Pitts / Galapagos Reef Shark {Carcharhinus galapagensis} Midway Is, Pacific ocean

Michael Pitts / Galapagos Reef Shark {Carcharhinus galapagensis} with schooling fish, Midway Is, Pacific ocean

Michael Pitts / Michael Pitts filming nesting Black footed Albatross {Diomedea nigripes} Midway Island, Pacific Ocean island, 1996

Michael Pitts / Schooling Galapogos sharks {Carcharhinus galapagensis} Midway Islands, Pacific ocean

Michael Pitts / Laysan Albatross (Phoebastria immutabilis) nesting pair with Black-footed albatross (Phoebastria nigripes) in background. Midway Is, Pacific ocean island

Michael Pitts / Leaf scorpionfish {Taenianotus triacanthus} Midway Atoll, Pacific

Michael Pitts / Giant trevally {Caranx ignobilis} Midway Is, Pacific

Michael Pitts / Glasseye / Bigeye {Heteropriacanthus cruentatus} Midway Is, Pacific

Michael Pitts / Tall ship. Midway Atoll, Hawaiian islands, Pacific.

Jeff Vanuga / Bison {Bison bison} feeding along Firehole River, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA

Michael Pitts / Laysan albatross (Phoebastria immutabilis) juvenile learning to fly, Midway Atoll, Pacific