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Rocky Mountain Bighorn Ram (Ovis canadensis) close up portrait, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

Head detail of a juvenile Nile crocodile (Crocodylus niloticus), basking in the sun, Lake Kariba, Zimbabwe, Africa

King penguin (Aptenodytes patagonicus) head detail at its breeding colony at Gold Harbor, South Georgia, Polar Regions

Girls with collected reeds on their heads on their way home, Toposa tribe, Eastern Equatoria, South Sudan, Africa

Rocky Mountain Bighorn Sheep Rams (Ovis canadensis) head-butting, Jasper National Park, UNESCO World Heritage Site, Alberta, Canadian Rockies, Canada, North America

Adult southern rockhopper penguins (Eudyptes chrysocome), head detail on Saunders Island, Falklands, South America

A Spotted Moray Eel (Gymnothorax moringa) displays an open mouth as it protrudes it's head just outside a hole in a coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.

Galapagos Land Iguana (Conolophus subcristatus), large lizard can can grow to five feet long and live for 60 years, South Plaza island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos Giant Tortoise (Chelonoidis chathamensis), can live for over one hundred years, Santa Cruz island, Galapagos, Ecuador, South America

Wild saltwater crocodile (Crocodylus porosus) head detail in porous creek on the Hunter River, Mitchell River National Park, Kimberley, Western Australia, Australia, Pacific

Leopard tortoise (Geochelone pardalis), Ngorongoro Conservation Area, Serengeti, Tanzania, East Africa, Africa

Adult white-throated savanna monitor (Varanus albigularis), head detail, Save Valley Conservancy, Zimbabwe, Africa

Unidentified ethnic Hmong minority people on rice terraces in the rural area of Sa Pa, near the border with China, Sapa, Lao Cai province, Vietnam, Indochina, Southeast Asia, Asia

A Black-finned snake eel (Ophichthus cephalozona) pokes its head out of a sandy seafloor in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

A cleaner shrimp searches for parasites on the head of this spotted moray eel, Tulamben, Bali, Indonesia.

Adult elegant tern (Thalasseus elegans), looking for fish on Isla Carmen, Baja California Sur, Sea of Cortez, Mexico, North America

White-backed vultures (Gyps africanus) and a skinny African elephant (Loxodonta africana) at waterhole, Savuti, Chobe National Park, Botswana, Africa

White-backed vultures (Gyps africanus) perching on a tree top, Savuti, Chobe National Park, Botswana, Africa

Blue Footed Booby (Sula nebouxii), a marine bird found in the Eastern Pacific whose unusual blue feet feature in courtship rituals, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult California gray whale (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America

Head on view showing cerata on an aeolid nudibranch, Pteraeolidia ianthina, in Komodo National Park, Indonesia.

Yellow-Ridged Ceratosoma (Ceratosoma flavicostatum) nudibranch, head on view, Komodo National Park, Indonesia.

Head-on portrait of purple anthias (Pseudanthias tuka) in black water, Manado, North Sulawesi, Indonesia.

Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean

Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean

Adult San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), endemic to Isla San Esteban, Baja California, Mexico, North America

An Agouti, rodent related to guinea pigs, common in Middle and South America, Ecuador, South America

Adult brown pelican (Pelecanus occidentalis), plunge diving for fish, Isla Carmen, Baja California Sur, Mexico, North America

An adult wild saltwater crocodile (Crocodylus porosus) in the Hunter River in Mitchell River National Park, Kimberley, Western Australia, Australia, Pacific

A school of razorfish (Aeoliscus strigatus), head down posture at night on Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia

A woman and her son in the branches of one of the oldest Live Oaks in the Outer Banks of North Carolina, Nags Head, North Carolina, United States of America, North America

A school of jointed razorfish (Aeoliscus strigatus), in their usual head down formation, off Bangka Island, Indonesia, Southeast Asia, Asia

Adult male Lion (Panthera leo) consuming a Zebra head in the Maasai Mara, Kenya, East Africa, Africa

Adult male Lion (Panthera leo) consuming a Zebra head in the Maasai Mara, Kenya, East Africa, Africa

Close-up of head of Chinstrap penguin (Pygoscelis antarcticus), Half Moon Island, Antarctica, Polar Regions

Vervet monkey (Chlorocebus), Gombe Stream National Park, Lake Tanganyika, Tanzania, East Africa, Africa

Adult San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), endemic to Isla San Esteban, Baja California, Mexico, North America

Great Kiskadee, (Pitangus Sulphuratus), a passerine bird common in Central and South America, Bermuda, Atlantic, North America

Heermann's gulls (Larus heermanni), quarreling at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica

Great blue heron (Ardea herodias), perched on a cardon cactus, Isla Espiritu Santo, BCS, Sea of Cortez, Mexico, North America

Adult Swallow-Tailed Gull, showing breeding season red rimmed eye, a nocturnal equatorial seabird, found almost exclusively in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult Atlantin puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland, United Kingdom

Adult Atlantin puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland, United Kingdom

An adult wild saltwater crocodile (Crocodylus porosus) hunting on the banks of the Hunter River in Mitchell River National Park, Kimberley, Western Australia, Australia, Pacific

Adult Atlantic puffin (Fratercula arctica) at Sumburgh Head, Mainland Island, Shetland Isles, Scotland, United Kingdom, Europe

A school of razorfish (Aeoliscus strigatus), head down posture on the house reef at Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia

Hippopotamus (Hippopotamus amphibius) with a red-billed oxpecker (Buphagus erythrorhynchus), Serengeti National Park, Tanzania, East Africa, Africa

Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

White-backed vultures (Gyps africanus) perching on a tree top, Savuti, Chobe National Park, Botswana, Africa

Adult San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), endemic to Isla San Esteban, Baja California, Mexico, North America

A snowy egret (Egretta thula), fishing in the shallows, San Jose del Cabo, Baja California Sur, Sea of Cortez, Mexico, North America

Adult Atlantin puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland, United Kingdom

Adult bull Antarctic fur seal (Arctocephalus gazella) head detail in Salisbury Plain, South Georgia, Polar Regions

Adult male Lion (Panthera leo) consuming a Zebra head in the Maasai Mara, Kenya, East Africa, Africa

A snowflake moray eel (Echidna nebulosa) pokes its head out of a hole in Komodo National Park, Indonesia. This beautiful area harbors extraordinary marine biodiversity and is a popular destination for divers and snorkelers.