Nick Garbutt / Sumatran pit viper (Trimeresurus sumatranus) juvenile on tree trunk, in tropical rainforest. Danum Valley, Sabah, Borneo, Malaysia.
01622435
David Tipling / Common European adder (Vipera berus) two males fighting over a female. Holt, North Norfolk, England, UK. April
01622434
David Tipling / Common European adder (Vipera berus) two males fighting over a female, Holt, North Norfolk, England, UK. April
01622430
David Tipling / Common European adder (Vipera berus) two males fighting over a female, Holt, North Norfolk, England, UK. April.
01632888
Fabio Pupin / Meadow viper, (Vipera ursinii), basking in alpine meadow, Apennines, Italy, September . Non-ex.
01632782
Fabio Pupin / Peringuey's desert adder, (Bitis peringueyi), sidewinding on dune, Namib desert, Namibia, February . Non-ex.
01620962
Daniel Heuclin / Horned viper (Vipera ammodytes) in natural setting, Turkey.
01625450
John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...
00583296
Chien Lee / Ecuadorian Toad-headed Pit-viper (Bothrocophias campbelli) in rainforest, Mashpi Amagusa Reserve, Pichincha, Ecuador
00573479
Pete Oxford / Puff Adder (Bitis arietans) near wetland, Marakele National Park, Limpopo, South Africa