Mark Carwardine / Aye-aye (Daubentonia madagascariensis) licking sap from trunk of tree, Captive, Tsimbazaza Zoo, Madagascar

Mark Carwardine / Siberian / Amur tiger (Panthera tigris altaica) yawning, Male rescued from poachers, ÊUtyos Wildlife Rehabilitation Centre, Kutuzovka Village, Russian Far East, in taiga forest, Endangered species

Michael D. Kern / Mossy leaf-tailed gecko, (Uroplatus sikorae) captive from Madgascar

Michael D. Kern / Leaf tailed gekco (Uroplatus fimbriatus) captive from Madagascar

Danny Green / Male Adder (Vipera berus) tasting the air. Cannock Chase, Staffordshire, UK, October.

Shibai Xiao / Tokay gecko (Gekko gecko) close up portrait of head with black background, Guangxi Province, China.

Alex Mustard / 2020VISION / Old male Grey seal (Halichoerus grypus) with mouth wide open showing worn teeth, Lundy Island, Bristol Channel, England, UK, May. 2020VISION Book Plate.

Daniel Heuclin / Great basin Gopher Snake / Bullsnake (Pituophis catenifer deserticola) head profile, controlled conditions, Joshua Tree National Monument, California USA

Roland Seitre / Black-footed Ferret (Mustela nigripes) seen in its burrow. The species is endangered on account of prey depletion and vulnerability to foreign infection. Declared extinct in the wild in 1987, a succes...

Fabrice Cahez / Wild cat (Felis silvestris) licking its lips, Vosges, France, July

Roy Mangersnes / Polar bear (Ursus maritimus) sitting with dark blue tongue showing, Spitsbergen, Svalbard, Norway, August

Edwin Giesbers / Red fox (Vulpes vulpes) drinking, The Netherlands, March