Michael D. Kern / Kaleidoscope pattern formed from picture of Johnstons Chameleon (Chamaeleo johnstoni) face and legs. Restricted for Editorial use until December 2015

Jack Dykinga / ARCHIVED SG - Duplicate 10/10/2017. Saguaro cactus (Carnegiea gigantea) at sunset, with drooping frost damaged limbs, South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona...

Sue Daly / Close-up of the limbs of a Spiny starfish (Marthasterias glacialis) showing its many tube feet moving over the seabed, Sark, British Channel Islands, UK, August.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette, Lake Clark National Park, Alaska

Ingo Arndt / Mosquito (Culicidae) freshly hatched sitting on water surface with reflection, Germany.

Bence Mate / Black-winged stilt (Himanthopus himantophus) in rain, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, July.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days sleeping in mother's arms, captive, occurs in Central Africa. Critically endangered.

Cheryl-Samantha Owen / African elephant (Loxodonta africana) close up of trunk, Amboseli National Park, Kenya.

Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) preparing to sleep, Ria Lagartos Biosphere Reserve, Yucatan Peninsula Mexico, July. Bookplate.

Markus Varesvuo / Dippers (Cinclus cinclus) fighting in snow, Kuusamo, Finland, March. Second Place in the Telephoto Lens Category of the Terre Sauvage Nature Images Awards competitiion 2015.

Bence Mate / Great egret (Ardea alba) hunting fish, Lake Csaj, Pusztaszer, Hungary, February. Winner of the Portfolio category of the Terre Sauvage Nature Images Awards competition 2015.

Danny Green / Red fox (Vulpes vulpes) scratching in the snow, Churchill, Cananda, November