Adult black-legged kittiwake (Rissa tridactyla) in combat with a second kittiwake near Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Young girls selling food, Gerewol festival, courtship ritual competition among the Wodaabe Fula people, Niger, West Africa, Africa

Rockhopper Penguins (Eudyptes chrysocome) washing in a stream on Westpoint island in the Falkland Islands off argentina, in South America. Numbers off rocxkhoppers have declined substantially, partly due to competition with commercial fishing and partly due to climate change, which causes their prey food to migrate to cooler waters.

Sub-Antarctic Skua (Catharacta antarctica) vie for a fish head on Barrentos Island in the Aitcho Island Group, south Shetland Islands, Antarctica.

Sub-Antarctic Skua (Catharacta antarctica) vie for a fish head on Barrentos Island in the Aitcho Island Group, south Shetland Islands, Antarctica.

Trainer and woman resting on bleachers

Mixed Race female runner drinking water

Water splashing on Caucasian woman cooling off with water bottle

Hispanic woman wearing boxing gloves resting on bleachers

Two men playing chess, Two men playing chess in an open-air restaurant at Raday Street, Pest, Budapest, Hungary

Moncalvo National Truffle Fair, evaluation of the white truffles (Tuber magnatum) entering the contest, Asti, Piedmont, Italy, Europe

Moncalvo National Truffle Fair, evaluation of the white truffles (Tuber magnatum) entering the contest, Asti, Piedmont, Italy, Europe

Moncalvo National Truffle Fair, evaluation of the white truffles (Tuber magnatum) entering the contest, Asti, Piedmont, Italy, Europe

Moncalvo National Truffle Fair, evaluation of the white truffles (Tuber magnatum) entering the contest, Asti, Piedmont, Italy, Europe

Common Jackal (Canis Aureus) and Black-backed Jackal (Canis mesomelas) attack and kill a Thomson's Gazelle (Gazella thomsoni) for food; Tanzania

Hyenas, Crocuta crocuta, with a carcass, stolen from a lioness, Panthera leo. Savuti, Chobe National Park, Botswana

Hyenas, Crocuta crocuta, with a carcass, stolen from a lioness, Panthera leo. Savuti, Chobe National Park, Botswana

Southern Carmine Bee-eater (Merops nubicoides), on the cliff of the Luangwa river, a white-fronted bee-eater (Merops bullockoides) hold the tail' feathers, Luangwa river, South Luangwa natioinal Park, Zambia, Africa

Fight. Seagull (Larus sp) facing Hooded Crow (Corvus cornix). Slovakia