Ross Hoddinott / Red fox (Vulpes vulpes) vixen yawning in the morning light (captive). Lifton, Devon, UK, May

Anup Shah / Leopard {Panthera pardus} licking its nose, Africa *Not available for jigsaw puzzle use until 31st Dec 2014*

Jose B. Ruiz / European chameleon feeding on grasshopper. Sequence 2/3. {Chamaeleo chamaeleon} Spain

Jose B. Ruiz / European chameleon feeding on grasshopper. Sequence 3/3. {Chamaeleo chamaeleon} Spain

Tony Phelps / Female Adder tasting the air with tongue {Vipera berus} Purbeck Dorset UK 2000

Alex Mustard / Long exposure of a group of Tarpon (Megalops atlanticus) hunt Silversides (Atherinidae) inside a coral cavern. George Town, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Portrait of a tarpon (Megalops atlanticus) on a coral reef. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

David Gallan / Lace monitor (Varanus varius) sensing with tongue, New South Wales, Australia, December.

Robert Valentic / Coastal taipan (Oxyuranus scutellatus) tasting air, Julatten, north Queensland, Australia,

Karine Aigner / Bengal tiger (Panthera tigris tigris) licking paw. Ranthambore National Park, Rajasthan, India.

TJ Rich / Four chocolate working cocker spaniels on wall. Mother and offspring. Monmouth, Monmouthshire, Wales

Paul Williams / RF - Sumatran tiger (Panthera tigris sumatrae) close up portrait, captive. staring at camera, licking nose, captive. (This image may be licensed either as rights managed or royalty free.)

Franco Banfi / Close view of a Green anaconda, (Eunectes murinus) underwater, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Andy Rouse / Bengal tiger (Panthera tigris) male T57 walking in dusk light, Ranthambhore, India

Steven David Miller / A Perentie (Varanus giganteus) using its forked tongue to detect smells, Alice Springs Reptile Centre, Northern Territory, Australia, Captive. May.

Theo Bosboom / Edible frog (Pelophylax k. esculentus) catching a common blue damselfly (Enallagma cyathigerum) with its tongue with pair mating on stem above, Hondenven, Tubbergen, The Netherlands, July.

Lucas Bustamante / Female African lion (Panthera leo) face portrait, Etosha National Park, Harare Province, Namibia.

Dave Bevan / Juvenile Jackson's chameleon (Chamaeleo jacksonii xantholophus) feeding, flicking tongue to catch insects. Captive.

Sandesh Kadur / Bengal monitor (Varanus bengalensis) smelling a stone with its tongue, Ranthambore National Park, Rajasthan, India. 2016.

Neil Aldridge / Lioness (Panthera leo) yawning in early morning light on Kariega Game Reserve, South Africa.

Matthew Maran / Grass snake (Natrix natrix) flicking tongue, Hampstead Heath, London, England, UK, August.

Bence Mate / Western diamond-backed rattlesnake (Crotalus atrox) Texas, USA, April.

Bence Mate / Orange chinned parakeets (Brotogeris jugularis) two looking at each other, Santa Rita, Costa Rica.

Claudio Contreras / Gulf coast ribbon snake (Thamnophis proximus orarius) Laredo Borderlands, Texas, USA. April

Claudio Contreras / Grey fox (Urocyon cinereoargenteus) licking nose, captive, Mexico City

Mark MacEwen / Komodo dragon (Varanus komodoensis) with tongue on out beach, Komodo National Park, the islands of Komodo, Indonesia. Vulnerable species.

Mark MacEwen / Komodo dragon (Varanus komodoensis) walking with tongue extended on beach, found in the islands of Komodo, Indonesia. Vulnerable species.

Mark MacEwen / Komodo dragon (Varanus komodoensis) with tongue extended on beach, Komodo National Park, Indonesia. Vulnerable species.

Jurgen Freund / Spectacled flying fox (Pteropus conspicillatus) feeding on nectar from flowers of the Golden penda (Xanthostemon chrysanthus), Atherton Tablelands, Queensland, Australia. June. Second Place in the Man...

Nick Garbutt / Darwin's hawkmoth (Xanthopan morgani praedicta) showing extraordinarily long coiled tongue. Andasibe-Mantadia National Park, Madagascar.

Tony Phelps / Cape cobra (Naja nivea) emerging from a Cape gerbil (Gerbilliscus afra) burrow, hunting and smelling with its tongue, De Hoop Nature Reserve, Western Cape, South Africa, January.

Silke Arndt / Western rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA, September.

Anup Shah / Long-tailed macaque (Macaca fascicularis) juvenile sticking tongue out. Khao Sam Roi Yot National Park, Thailand.

Daniel Heuclin / Western diamondback rattlesnake (Crotalus atrox) tasting air, in habitat, Arizona, USA, October. Controlled conditions

John Cancalosi / Western diamondback rattlesnake (Crotalus atrox), defensive rattling, Arizona, USA, April.

Ole Jorgen Liodden / Common sandpiper (Actitis hypoleucos) singing with tongue visible, Norway, June.

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback yawning with mouth wide open. Rwanda.

Denis-Huot / West African giraffe (Giraffa camelopardalis peralta) mother and baby nuzzling each other. Bioparc Zoo de Doue la Fontaine, France. Captive, occurs in south-western Niger. Endangered subspecies.

Mark Taylor / Red toy poodle looking up at camera an sticking out tongue.

Angelo Gandolfi / Toco Toucan (Ramphastos toco) beak open with tongue visible while feeding on mango, Brazil

Chris Mattison / Green tree monitor (Varanus prasinus) with tongue extended, captive from SE Asia.

Denis-Huot / Leopard (Panthera pardus) female yawning, Samburu game reserve, Kenya

Edwin Giesbers,Edwin Giesbers / Asiatic black / Moon bear (Ursus thibetanus) head portrait with tongue hanging out, captive

Florian Möllers / A Malinois / Belgian Shepherd police dog 'Mia' owned by German police officer and dog handler, playing in the snow. Germany

Staffan Widstrand / Polar Bear (Ursus maritimus) head portrait with blue tongue out, Svalbard, Norway

Staffan Widstrand / Polar Bear (Ursus maritimus) head portrait with blue tongue sticking out, Svalbard, Norway

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

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