We've added a fascinating mix of new images to our site in the last month, including new contributors Nick Hawkins and Yashpal Rathore. African wildlife was well represented, plus dramatic landscapes from South America, bird migration, wild horses from Carol Walker, reindeer festivals and material from Ingo Arndt's grassland project.
Huw Cordey / Red-side garter snakes (Thamnophis sirtalis parietalis) outside hibernation dens, Narcisse snake dens, Manitoba, Canada. The snake in the foreground is a female . She is surrounded by the smaller male...
Yashpal Rathore / Demoiselle crane (Anthropoides virgo) low angle fisheye perspective of feeding cranes. Khichan, Western Rajasthan, India. February, 2015
Huw Cordey / Mexican free-tailed bats (Tadarida brasiliensis) emerging from Bracken Cave, Texas. Over 15 million bats are thought to live in this cave, making it the greatest concentration of mammals on the planet...
Ingo Arndt / American Alligator (Alligator mississippiensis) split level, Everglades, USA, January.
Nick Hawkins / Red-eyed treefrog (Agalychnis calidryas) Costa Rica, April 2015.
Nick Hawkins / Yellow-spotted salamander eggs (Ambystoma maculatum) showing symbiosis with green algae, New Brunswick, Canada, May 2015.
Yashpal Rathore / Demoiselle crane (Anthropoides virgo) flying silhouetted and framed by Jarokha (carved windows) of a Haveli or townhouse. Khichan, Western Rajasthan, India. December.
Neil Aldridge / African elephant (Loxodonta africana) baby looking out from the safety of beneath its mother's legs, Northern Tuli Game Reserve, Botswana. Vulnerable species. The African elephant is classified as vul...
Danny Green / Coastal brown bear (Ursus arctos) eating a fish, Lake Clarke National Park, Alaska, September
George Sanker / Wild turkey (Meleagris gallopavo) in mating display. Acadia National Park, Maine, USA. April.
Neil Aldridge / Leopard (Panthera pardus) male in vegetation, Chief's Island, Okavango Delta, Botswana. Vulnerable species.
Nick Hawkins / Northern tamandua (Tamandua mexicana) Nicoya Peninsula, Costa Rica.
Wim van den Heever / African elephant (Loxodonta africana) three big bull elephants spending the late afternoon at waterhole, Ol'Donyo Kenya.
Carol Walker / Wild Mustang horse rearing, Pryor mountains, Montana, USA. June.
Carol Walker / Head portrait of grey almost white Andalusian mare running in snow, Berthoud, Colorado, USA. January.
Danny Green / Caribou / Reindeer bull (Rangifer tarandus) grazing, Denali National Park, Alaska, USA, September
Bryan and Cherry Alexander / Nenets women and children in traditional reindeer skin clothing at a festival on the tundra. Yamal, Siberia, Russia.
George Sanker / White-tailed deer (Odocoileus virginianus) in snow, Acadia National Park, Maine, USA. February.
Nick Garbutt / Sun beam at sun rise over the Grand Canyon of the Yellowstone, Yelllowstone National Park, Wyoming, USA. January 2016.
Martin Gabriel / High water of the Danube, Weltenburg Monastery flooded, but protected by flood control measures, nature reserve Weltenburger Enge, Kelheim county, Bavaria, Germany, June 2013
Sandra Bartocha / European beech (Fagus sylvatica) and Pines, Schweingartensee, Serrahn, Muritz-National Park, World Natural Heritage site, Germany, Europe. November 2015.
Pete Oxford / Aerial view of Cuyuni river, Guyana, South America
Pete Oxford / Kaieteur Falls is the world's widest single drop waterfall, located on the Potaro river in the Kaieteur National Park, in Essequibo, Guyana, South America
Wim van den Heever / African elephants (Loxodonta africana) small herd at waterhole at sunset, Etosha National Park, Namibia
Wim van den Heever / South african fur seal (Arctocephalus pusillus pusillus) two on beach at dusk, Walvis Bay Namibia
Merryn Thomas / People stand with dune buggy in desert at Huacachina oasis, Ica region, Peru, December 2013.
Ingo Arndt / Prairie rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA September. Sequence 1 of 3
Carol Walker / Head portrait of grey Arabian stallion running in desert dunes near Dubai, United Arab Emirates.
Ingo Arndt / Masai giraffe (Giraffa camelopardalis tippelskirchi) males fighting, Masai Mara National Reserve, Kenya. Sequence 3 of 3
Pete Oxford / Giraffe (Giraffa camelopardalis) with Red billed oxpecker (Buphagus erythrorhynchus) on head, Marakele Private Reserve, Waterberg Biosphere Reserve, Limpopo Province, South Africa.
Pete Oxford / Giraffe (Giraffa camelopardalis) family, Marakele Private Reserve, Waterberg Biosphere Reserve, Limpopo Province, South Africa, November.
Neil Aldridge / Black rhinoceros (Diceros bicornis) feeding in early morning light, Kariega Game Reserve. South Africa.
Neil Aldridge / Sable antelope (Hippotragus niger) bull charging through the shallows of the Selinda Spillway, with another behind, northern Botswana, August.
Ingo Arndt / Topi (Damaliscus lunatus) herd grazing in plains landscape with rays of sunlight, Masai Mara Game Reserve, Kenya
Ingo Arndt / Burchell's zebra (Equus burchellii) herd grazing, Masai Mara Game Reserve, Kenya
Neil Aldridge / Steenbok (Raphicerus campestris) female standing framed by a fallen tree, Mapungubwe National Park, Limpopo Province, South Africa.
Wim van den Heever / African buffalo (Syncerus caffer) lone bull set in a landscape with beautiful sunset, Masai Mara NR, Kenya
Neil Aldridge / Two Impalas (Aepyceros melampus) ewes grooming each other in evening light on South Africa's Kruger National Park.
Eric Baccega / African elephant (Loxodonta africana) group with one raising trunk and foraging in the savanna Queen Elizabeth National Park, Uganda, Africa
Eric Baccega / Two juvenile African elephants (Loxodonta africana) bathing and play fighting, Lake Edward, Queen Elizabeth National Park, Uganda, Africa
Neil Aldridge / Portrait of an African elephant (Loxodonta africana) on Selinda Reserve, Botswana.
Neil Aldridge / Spotted hyaena (Crocuta crocuta) reassuring her tiny pup at the entrance to their den, Northern Tuli Game Reserve, Botswana.
Huw Cordey / African hunting dogs (Lycaon pictus) pack mobbing a Spotted hyena (Crocuta crocuta). Hyenas follow the dogs and attempt to steal their kills, so the dogs harass them whenever they get a chance. Liuwa...