Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.
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Will Burrard-Lucas / Three Ethiopian wolf (Canis simensis) pups waiting for their parents to return, Ethiopia.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Theo Bosboom,Theo Bosboom / Arctic tern (Sterna paradisae) on telegraph lines, near a small village on the Reykjanes peninsula in the south west of Iceland, June
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Konrad Wothe / Barn Swallow (Hirundo rustica) chicks lined up in nest with their mouths open waiting for food, Germany
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Francisco Marquez / Volunteers standing in a line, waiting to ring Greater flamingo (Phoenicopterus ruber) juveniles, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Volunteers holding Greater flamingo (Phoenicopterus ruber) juveniles to be measured during the ringing process, Fuente de Piedra lagoon, Malaga, Spain. August.
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David Fleetham / Diver hanging on a line at 15 feet for a decompression stop before surfacing. Kauai, Hawaii. March 2016. Model released.
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Sue Flood / Emperor penguins (Aptenodytes forsteri) four adult penguins stand in row waiting going to sea to feed. Gould Bay, Weddell Sea, Antarctica.
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John Cancalosi / People queuing to vote during Kenyan election, near Kitale Kenya, August 8, 2017,
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John Cancalosi / People queuing to vote during Kenyan election, near Kitale Kenya, August 8 2017.
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Pal Hermansen / Masai people queuing to vote on election day, Kenya, March 2013.