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.

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

Christophe Courteau / Peringuey's adder (Bitis peringueyi) buried in sand, flicking tongue, hunting, Namib Desert, Namibia.

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

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.

Francois Savigny / Male lion washing paw {Panthera leo} Southern Africa

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

Ingo Arndt / Prairie Rattlesnake (Crotalus viridis viridis) in defensive posture, South Dakota

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.