Juan Carlos Munoz / Magellanic penguin (Spheniscus magellanicus) flapping its wings, with another lying down. Puerto Deseado, Patagonia, Argentina, Nov 2008

Bernard Castelein / Cinereous / European Black Vulture (Aegypius monachus) in dispute with an Eurasian Griffon Vulture (Gyps fulvus), alongside a Himalayan Griffon (Gyps himalayensis) and Long-billed Vulture (Gyps indicu...

Petra Wegner / Two Miniature Schnauzers, black-silver and pepper-and-salt coated, sitting in autumn foliage

Andrew Parkinson / Pair of Great Crested Grebes (Podiceps cristatus) during their elaborate courtship dance. March. Derbyshire, UK, March (non-ex)

Andrew Parkinson / Pair of Mallard ducks (Anas platyrhynchos) on a lake in dawn, Derbyshire, UK. April (non-ex)

Bence Mate / Keel-billed Toucan (Ramphastos sulfuratus) in aggressive encounter with a Montezuma Oropendola (Psarocolius montezuma), Laguna del Lagarto, Santa Rita, Costa Rica

Alex Mustard / Female Grey seal (Halichoerus grypus) startled. Lundy Island, Devon, England, UK.

Kim Taylor / Three-eyed Iguanid Lizard (Chalarodon madargascariensis) portrait standing.

Steve Knell / Harlequin duck (Histrionicus histrionicus) male standing in rapids, Iceland, May

Alex Hyde / Head and forelegs of tropical Katydid {Tettigoniidae} photographed on white background. Masoala Peninsula National Park, north east Madagascar.

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) being used to poison an arrow that makes it deadly enough to bring down game, Colombia

Sergey Gorshkov / Kamchatka Brown bear (Ursus arctos beringianus) standing beside lake looking for salmon, Kamchatka, Far east Russia, August

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) being used to poison an arrow that makes it deadly enough to bring down game, Colombia

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) group used by Embera Choco Indians to poison their darts for hunting, Colombia

Mark Moffett / Golden Lancehead (Bothrops insularis), University of Sao Paulo researcher Marcio Martins holds one snake while watching another, a deadly venomous snake living only on Queimada Grande Island, Atlantic...

Norbert Wu / Blue-ringed Octopus (Hapalochlaena sp) deadly venom can paralyze a human's respiratory system in eight minutes, pulses blue rings when angry, Australia

Mark Moffett / Embera Choco people use a distinctive kind of blowgun and secretion from Golden Poison Dart Frog (Phyllobates terribilis) to poison on their darts for hunting, Colombia

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) used by Embera Choco Indians to poison their darts for hunting, Colombia

Norbert Wu / Sea Wasp (Chironex fleckeri) warning sign notifying swimmers that sting can be fatal, Queensland, Australia

Mark Moffett / Embera Choco Indian tasting curare from the sap of a tree, curare is used to poison the tips for hunting arrows, Colombia

Mark Moffett / Embera Choco Indian collecting curare from the sap of a tree which is used to poison the tips for hunting arrows, Colombia

Norbert Wu / Crown-of-thorns Starfish (Acanthaster planci) are cleared by Ron Leidich since they damage coral reefs, cause of population explosion is unknown, Palau

Norbert Wu / Common Lionfish (Pterois volitans) amid colorful Soft Corals, Sipidan Island, Borneo

Mark Moffett / Flea Beetle (Diamphidia nigroornata) larvae used to poison arrow by Kalahari or Kung Desert Bushman, Namibia

Mark Moffett / Goliath Bird-eating Spider (Theraphosa blondi) with researcher's gloved hand showing defensive behavior where spider breaks off toxic hairs from abdomen with hind legs, French Guiana

Mark Moffett / Flea Beetle (Diamphidia nigroornata) larvae used to poison arrows are thought after by Kalahari or Kung Desert Bushman who is digging for them, Namibia

Mark Moffett / Dr Mark Moffet at right getting a close look at Golden Poison Dart Frog (Phyllobates terribilis) captured by Embera Choco Indians to make poison-tipped darts, Colombia

Mark Moffett / Green and Black Poison Dart Frog (Dendrobates auratus) male seeks suitable pool for tadpoles while researcher Dr Summers observes parental behavior, Taboga Island, Panama

Mark Moffett / International Frog Day takes place twice a year, hundreds of Poison Dart Frog enthusiasts converge to buy and trade frogs because many species are becoming increasingly rare, export from tropical Amer...

Mark Moffett / Krait (Bungarus sp) found by russian herpetologist Olig Shumakor and Ted Papenfuss, Tam Dao National Park, Vietnam

Yves Lanceau / Domestic dog, Pekingese, studio portrait