Staffan Widstrand / Wild Wonders of China / Tree frog (Amolops afghanus) female sitting on moss Tongbiguan Nature Reserve, Dehong prefecture, Yunnan province, China, May.

Ingo Arndt / Villagers collecting eggs from Olive ridley sea turtles (Lepidochelys olivacea) during the first two days of the arribada (mass nesting event). This is the only place in the world where it is legal to...

Markus Varesvuo / Snowy owl (Bubo scandiaca) female sitting among snow covered vegetation on ground, Canada February

Andy Rouse / African Elephant (Loxodonta africana) mother and calf in rain, wallowing in mud. Maasai Mara, Kenya, Africa. September.

Cyril Ruoso / Western lowland gorilla (Gorilla gorilla gorilla) female suckling baby, captive at Monkey Valley Zoo. Non-ex

George Sanker / Golden-mantled ground squirrel (Callospermophilus lateralis) feeding on flowers, Yellowstone National Park, Wyoming, USA, June.

Ann & Steve Toon / Baby ground squirrel (Xerus inauris) using its tail for shade, Kgalagadi Transfrontier Park, South Africa. Non-ex.

Eric Baccega / Naro San Bushmen sitting in front of their hut, Kalahari, Ghanzi region, Botswana, Africa. Dry season, October 2014.

Will Burrard-Lucas / Meerkat (Suricata suricatta) adult with babies, Makgadikgadi Pans, Botswana.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) young cub, northern Finland, July.

Mark MacEwen / Elk (Cervus canadensis) stag resting outside house during the rut, Estes Park, Larimer County, Rocky Mountains, Colorado, United States, September.

Anup Shah / Sumatran orangutan (Pongo abelii) mature male 'Halik' aged 26 years sitting in a forest clearing watched from a tree by female 'Juni' aged 12 years. Gunung Leuser National Park, Sumatra, Indonesia. Re...