Carol Walker / Two wild horses, sibling fillies, nuzzling, Lost Creek, Wyoming, USA. June.
01741980
Carol Walker / Two wild stallions fighting, a bay roan and a black stallion, Salt Wells Creek, Wyoming, USA. June.
01741978
Carol Walker / Three wild stallions, two greys and a sorrel, standing in a group, Lost Creek, Wyoming, USA. July.
01741976
Carol Walker / Wild Bay stallion leading his grey mare across grassland, Lost Creek, Wyoming, USA. July.
01741972
Ann & Steve Toon / White rhinoceros (Ceratotherium simum) female and calf at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa.
01741956
Alex Mustard / Two Red Sea goatfish (Parupeneus forsskali) wrapping their barbels around each other, fighting, Sharm El Shiekh, Sinai, Egypt. Red Sea.
01741952
Alex Mustard / Pygmy lemon gobies (Lubricogobius exiguus) pair, guarding their home in a glass bottle, Batangas marine protected area, Luzon, Philippines, Verde Island Passages, Pacific Ocean.
01741951
Alex Mustard / Coleman shrimps (Periclimenes colemani) pair, female on right, camouflaged in their Fire urchin (Asthenosoma varium) home, Batangas marine protected area, Luzon, Philippines. Verde Island Passages, Pa...
01741944
Alex Mustard / Two divers exploring the bow of the USS Kittiwake wreck (a US Military submarine rescue vessel deliberately sunk as a diving attraction in 2011), Seven Mile Beach, Grand Cayman, Cayman Islands, Caribb...
01731565
Bernard Castelein / Two Common shelducks (Tadorna tadorna) in flight, male chasing another male over pond, Kruibeekse Polder, Belgium. April.
01731564
Bernard Castelein / Common pochard (Aythya ferina) pair in flight with reedbeds behind, Kruibeekse Polder, Belgium. April.
01739322
Joel Sartore / Photo Ark / Cotton-top tamarins (Saguinus oedipus) curiously looking around, Safari North, Brainerd. This species is from Colombia. Critically endangered. Captive.