Bence Mate / Keel-billed Toucan (Ramphastos sulfuratus) attacking a Brown-hooded Parrot (Pionopsitta haematotis) Laguna del Lagarto, Santa Rita, Costa Rica

Bence Mate / Collared Aracari (Pteroglossus torquatus) displaying at Montezuma Oropendola (Psarocolius montezuma) Laguna del Lagarto, Santa Rita, Costa Rica

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

Bence Mate / Three Brown-hooded Parrots (Pyrilia haematotis) one taking off from branch, in the rain Laguna del Lagarto, Santa Rita, Costa Rica

Gerrit Vyn / Ruddy Duck (Oxyura jamaicensis) male in breeding plumage performing a "bubbling display"which is used in both courtship and aggressive territorial encounters. The male holds its head and tail and 2 ro...

Gerrit Vyn / Aggressive encounter between two male Greater Prairie-Chickens (Tympanachus cupido) on a lek. During these aggressive encounters, males lower their pinnae feathers, deflate their air sacs, leap into t...

Gerrit Vyn / Aggressive encounter between two male Greater Prairie-Chickens (Tympanachus cupido) on a lek. During these aggressive encounters, males lower their pinnae feathers, deflate their air sacs, leap into t...

Mark Moffett / Green and Black Poison Dart Frog (Dendrobates auratus) meets a Tarantula, Taboga Island, Panama Tarantulas eat frogs but avoid Poison Dart Frogs, yet on Taboga, such encounters are common and Tarantul...

Alex Mustard / A diver encounters a common cuttlefish (Sepia officinalis) above seaweeds, Xlendi Bay, Gozo Island, Malta, Mediterranean Sea. June 2012, Model released

Bryan and Cherry Alexander / Expedition cruise ship "Grigoriy Mikheev" encounters a Polar bear (Ursus maritimus) on the shifting pack ice west of Spitsbergen, Svalbard, Norway, June.

Axel Gomille / Sloth Bear (Melursus ursinus) adult male encounters Ruddy Mongoose (Herpestes smithii). Karnataka, India.

Paul Hobson / Great skua (Stercorarius skua) adult and shetland lamb encounter-conflict, Shetland, Scotand, UK, June

Daniel Heuclin / Walker and her dog encountering an Asp viper(Vipera aspis) Vendée, Western France, Europe. Controlled conditions.

Gerrit Vyn / Aggressive encounter between two male Greater Prairie-Chickens (Tympanachus cupido) on a lek. During these aggressive encounters, males lower their pinnae feathers, deflate their air sacs, leap into t...

Eric Baccega / Bear sign stating official park safety information and regulations regarding bear encounters, Banff National Park, Rocky Mountain, Alberta, Canada, September 2009

Staffan Widstrand / Man looking at Harp seal pup {Phoca groenlandicus}, close encounters, White Sea, Russia

Yva Momatiuk & John Eastcott / Caribou (Rangifer tarandus) young bull encounters Red Fox (Vulpes vulpes) in autumn tundra, Denali National Park, Alaska

Roberto Rinaldi / Blue Lagoon Island (formerly Salt Cay), Bahamas, owned by Dolphin Encounters.