Richard Du Toit / Red-billed Oxpecker (Buphagus erythrorhynchus) small flock on an animal's back, Kruger National Park, South Africa

Tim Fitzharris / Tawny Eagle (Aquila rapax) perching on an old tree branch, Kenya

Pete Oxford / Vicuna (Vicugna vicugna) herd grazing beneath Mt Chimborazo, an extinct volcano, at 6,310 meters its summit is the furthest point from the center of the earth, Andes Mountains, South America

Gerry Ellis / African Elephant (Loxodonta africana) baby orphan meeting Malalka, an old female, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) young orphans meeting Imenti, an older male orphan, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / Windmill farm near San Francisco using propellers and generators as an alternative energy source, California

Gerry Ellis / African Elephant (Loxodonta africana) baby orphan meeting Malaika, an old female, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Pete Oxford / Chagra cowboy on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboys on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboys on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy on an overnight ride at a hacienda to herd cattle practicing with his lasso, Andes Mountains, Ecuador

Heidi & Hans-Juergen Koch / Great Egret (Ardea alba) resting on the back of an American Alligator (Alligator mississippiensis), Florida

Michael & Patricia Fogden / Magnetic Termite (Amitermes meridionalis) mounds, the broad side of the mounds always face east and west, an arrangement involved in thermal regulation, Litchfield National Park, Northern Territory, A...

Norbert Wu / Sea Urchin (Sterechinus neumayeri) group gathers on an ice fall to eat algae, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) group on ice floe being passed by an Icebreaker, Possession Island, Ross Sea, Antarctica

Norbert Wu / Purple Sea Mane (Drymonema dalmatinum) jellyfish, Thailand, responsible for mass blooms in Gulf of Mexico where it is an invasive species

Mark Moffett / Phorid fly attacks leaf carrying Leafcutter Ant (Atta cephalotes) the fly will lay an egg from which a parasitizing maggot will hatch, Belize

Jim Brandenburg / Big Bluestem (Andropogon gerardii) grass blowing in the wind, an important part of the tallgrass prairie ecosystem, South Dakota

Mitsuaki Iwago / Tourists in an inflatable zodiac boat approaching an iceberg, Antarctica

Tui De Roy / Short-tailed Albatross (Phoebastria albatrus) decoys donated from Japan placed strategically in an attempt to establish new breeding colony, Midway Atoll, Hawaii

Tui De Roy / Kiwifruit (Actinidia deliciosa) grown in New Zealand was renamed the Kiwi Fruit for export and became an international success, New Zealand

Norbert Wu / Purple Sea Mane (Drymonema dalmatinum) jellyfish, Thailand, responsible for mass blooms in Gulf of Mexico where it is an invasive species

Fred Bavendam / Frilled Sea Anemone (Metridium senile) surrounded by genetic clones of an Orange Frilled Sea Anemone, British Columbia, Canada

Fred Bavendam / Sea Pen (Sarcoptilus grandis) field with an Ocellate Sea Star (Nectria ocellata) crawling among them, Port Davey, Tasmania, Australia

Flip Nicklin / Diver Glenn Williams swimimg under an open ice lead as tour group watches from above, Admiralty Inlet, Baffin Island, Canada

Fred Bavendam / Butterfly Perch (Caesioperca lepidoptera) swimming in an invertebrate community including Sponges, Gorgonians and Golden Zoanthids at 35 meters depth, Bicheno, Tasmania, Australia

Fred Bavendam / Fusilier (Caesio sp) school stream by an Elephants Ear Sponge (Ianthella basta) laden with Crinoids, Kimbe Bay, WNBI, Papua New Guinea

Norbert Wu / Sea Urchin (Sterechinus neumayeri) group and Sea Stars gather on an ice fall to eat algae, Antarctica

Mark Moffett / Leafcutter Ant (Atta vollenveideri) decaying nests which play an important ecological role since palms and mesquites sprout from the fertile soil created by the nests, Paraguay

Fred Bavendam / White-bonnet Anemonefish (Amphiprion leucokranos) and an Orange-fin Anemonefish (Amphiprion chrysopterus) occupying the same sea anemone, Milne Bay, Papua New Guinea

Sumio Harada / Coyote (Canis latrans) and Common Raven (Corvus corax) group and Magpies scavenge an elk carcass, Yellowstone National Park, Wyoming

Neil Aldridge / A group of meerkats (Suricata suricatta) or suricates, stand on an old termite mound to gain extra height and watch for predators in their territory on the edge of Makgadikgadi Pans National Park, Bot...

Paul D Stewart / Illustartion of series of primate skeletons, the frontis engraving by Waterhouse Hawkins from the first edition of Huxley's 1863 'Evidences as to Man's Place in Nature'. In this book Huxley presented...

Paul D Stewart / Portrait of John Gould (14 September 1804 - 3 February 1881). Engraving by T.H. Maguire 1849 as part of the friends of the Ipswich Museum series. Gould was a wildlife illustrator and ornithologist bor...

Paul D Stewart / Illustrations of barnacles, anemones and other invertebrates, 'Balanite Balanus' from the 'Encyclopedie Methodique - Histoire Naturelle les Vers ' published by Pancoucke 1792. Lamarck worked on this e...

Donald M. Jones / Magnificent Frigatebird (Fregata magnificens) flock flying, Sian Ka'an Biosphere Reserve, Mexico

Onne van der Wal / Snorkeling off the back of an 88 foot Tripp designed sloop, "Shaman", in the Vava'u group of islands, Tonga, South Pacific.

Onne van der Wal / A group of tourists cruise along the Matevulu river in an inflatable boat, Vanuatu, Pacific Islands

Onne van der Wal / A group of chinstrap penguins (Pygoscelis antarctica) on an iceberg off South Georgia Island, March 2003.

Onne van der Wal / Storm surf on the coast of an island in the Vava'u group, Tonga, Melanesia.

Onne van der Wal / A group of chinstrap penguins (Pygoscelis antarctica) on an iceberg off South Georgia Island, March 2003.

Onne van der Wal / Heavy Pacific Ocean storm surf on the weather side of an island in the Vava'u group, Tonga.

Onne van der Wal / Underwater view of the hull and keel of "Shaman," an 88 ft yacht anchored in Tonga, part of the Vava'u Group of islands, South Pacific, 2000.

Onne van der Wal / A tender off the stern of an 88 foot Tripp designed sloop, "Shaman", anchored in the Vava'u group of islands, Tonga, South Pacific.

Eric Baccega / Group of Asiatic black bears playing (Ursus thibetanus) within an enclosure at the Chengdu rescue centre of the Animal Asia Foundation, Sichuan, China September 2008

Colin Monteath / Moeraki Boulders, an example of septarian concretions at sunset, Moeraki Beach, Otago, New Zealand

Ingo Arndt / Harvestman (Leiobunum sp) group, an introduced and invasive species, Germany

Onne van der Wal / A group of chinstrap penguins (Pygoscelis antarctica) on the edge of an iceberg off South Georgia Island, March 2003.

Mark Moffett / Marauder Ant (Pheidologeton diversus), major worker killing an intruder who tried to get through the trunk trail, Malaysia

Mitsuaki Iwago / African Elephant (Loxodonta africana) herd staying cool in the shade of an Acacia tree, Botswana

Katherine Feng / Arrow Bamboo (Pseudosasa japonica) freshly cut bamboo is weighed and paid for at the Wolong Nature Reserve in China to help feed the 50-60 Pandas there An adult Panda will eat approximately 20 kilogra...

Mark Moffett / Weaver Ant (Oecophylla longinoda) group grab an adjacent leaf and stem with mandibles and toes and pull, gradually binding them together to make a nest, Malaysia

Michael Quinton / Common Raven (Corvus corax) group feeding on an Elk (Cervus elaphus) carcass, Yellowstone National Park, Wyoming

Michael Quinton / Common Raven (Corvus corax) group feeding on an Elk carcass as Bison (Bison bison) walk by, Yellowstone National Park, Wyoming