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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... - John Chan
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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...
Sunda island pitviper (Trimeresurus insularis) in tree, Komodo Island. - Daniel  Heuclin
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Daniel Heuclin / Sunda island pitviper (Trimeresurus insularis) in tree, Komodo Island.
Prairie rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA September. Sequence 1 of 3 - Ingo Arndt
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Ingo Arndt / Prairie rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA September. Sequence 1 of 3
Western diamond-backed rattlesnake (Crotalus atrox) Texas, USA, April. - Bence  Mate
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Bence Mate / Western diamond-backed rattlesnake (Crotalus atrox) Texas, USA, April.
Western rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA, September. - Silke Arndt
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Silke Arndt / Western rattlesnake (Crotalus viridis viridis), threat display, South Dakota, USA, September.
Western diamondback rattlesnake (Crotalus atrox) tasting air, in habitat, Arizona, USA, October. Controlled conditions - Daniel  Heuclin
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Daniel Heuclin / Western diamondback rattlesnake (Crotalus atrox) tasting air, in habitat, Arizona, USA, October. Controlled conditions
Western diamondback rattlesnake (Crotalus atrox), defensive rattling, Arizona, USA, April. - John Cancalosi
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John Cancalosi / Western diamondback rattlesnake (Crotalus atrox), defensive rattling, Arizona, USA, April.
Group of gravid female Timber rattlesnakes (Crotalus horridus) basking before giving birth, Pennsylvania, USA, July. - John Cancalosi
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John Cancalosi / Group of gravid female Timber rattlesnakes (Crotalus horridus) basking before giving birth, Pennsylvania, USA, July.
Female Timber rattlesnake (Crotalus horridus) at nest site with newborn young, Pennsylvania, USA, September. - John Cancalosi
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John Cancalosi / Female Timber rattlesnake (Crotalus horridus) at nest site with newborn young, Pennsylvania, USA, September.
Sidewinder (Crotalus cerstastes) in sand dunes, Anza-Borrego Desert State Park, California, USA, May. - Chris  Mattison
01490546
Chris Mattison / Sidewinder (Crotalus cerstastes) in sand dunes, Anza-Borrego Desert State Park, California, USA, May.
Mojave rattlesnake (Crotalus scutulatus) Mojave desert, California, June. - Daniel  Heuclin
01448577
Daniel Heuclin / Mojave rattlesnake (Crotalus scutulatus) Mojave desert, California, June.
Bamboo pitviper, (Viridovipera stejnegeri) captive from Asia - Michael D. Kern
01395933
Michael D. Kern / Bamboo pitviper, (Viridovipera stejnegeri) captive from Asia
Sri Lankan Bamboo Pitviper (Trimeresurus trigonocephalus) captive, from Sri Lanka - Michael D. Kern
01395844
Michael D. Kern / Sri Lankan Bamboo Pitviper (Trimeresurus trigonocephalus) captive, from Sri Lanka
Pope's pitviper (Trimeresurus / Popeia popeorum)captive, from SE Asia - Daniel Heuclin
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Daniel Heuclin / Pope's pitviper (Trimeresurus / Popeia popeorum)captive, from SE Asia
RF- Western Diamondback Rattlesnake (Crotalus atrox), adult in striking pose with rattle raised, in wildflowers. Laredo, Webb County, South Texas, USA. April. (This image may be licensed either as rig... - Rolf Nussbaumer
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Rolf Nussbaumer / RF- Western Diamondback Rattlesnake (Crotalus atrox), adult in striking pose with rattle raised, in wildflowers. Laredo, Webb County, South Texas, USA. April. (This image may be licensed either as rig...
Ventral view of Wagler's / Temple Pitviper (Tropidolaemus wagleri). Controlled conditions. Mindanao, Philippines, February. - Daniel Heuclin
01340034
Daniel Heuclin / Ventral view of Wagler's / Temple Pitviper (Tropidolaemus wagleri). Controlled conditions. Mindanao, Philippines, February.
Wagler's / Temple Pitviper (Tropidolaemus wagleri) climbing among branches. Controlled conditions. Mindanao, Philippines, February. - Daniel Heuclin
01340032
Daniel Heuclin / Wagler's / Temple Pitviper (Tropidolaemus wagleri) climbing among branches. Controlled conditions. Mindanao, Philippines, February.
Portrait of Wagler's / Temple Pitviper (Tropidolaemus wagleri) showing the thermo-receptive pit organ between the eye and mouth. Controlled conditions. Mindanao, Philippines, February. - Daniel Heuclin
01340031
Daniel Heuclin / Portrait of Wagler's / Temple Pitviper (Tropidolaemus wagleri) showing the thermo-receptive pit organ between the eye and mouth. Controlled conditions. Mindanao, Philippines, February.
Portrait of Wagler's / Temple Pitviper (Tropidolaemus wagleri) showing the thermo-receptive pit organ between the eye and mouth. Controlled conditions. Mindanao, Philippines, February. - Daniel Heuclin
01340029
Daniel Heuclin / Portrait of Wagler's / Temple Pitviper (Tropidolaemus wagleri) showing the thermo-receptive pit organ between the eye and mouth. Controlled conditions. Mindanao, Philippines, February.
Wagler's / Temple pit viper (Tropidolaemus wagleri) in lowland rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia - Tim Laman
01302522
Tim Laman / Wagler's / Temple pit viper (Tropidolaemus wagleri) in lowland rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia
Striped western diamondback rattlesnake (Crotalus atrox) captive, from USA - Michael  D. Kern
01295721
Michael D. Kern / Striped western diamondback rattlesnake (Crotalus atrox) captive, from USA
Temple / Wagler's Pit Viper [Tropidolaemus wagleri] Bako National Park, Sarawak, Borneo. September - Tony Heald
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Tony Heald / Temple / Wagler's Pit Viper [Tropidolaemus wagleri] Bako National Park, Sarawak, Borneo. September
Wagler's / Temple pitviper (Tropidolaemus wagleri) on leaf, in defensive / strike posture, Danum Valley, Sabah, Borneo - Nick Garbutt
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Nick Garbutt / Wagler's / Temple pitviper (Tropidolaemus wagleri) on leaf, in defensive / strike posture, Danum Valley, Sabah, Borneo
Eyelash viper coiled {Bothrops schlegeli} captive - Lynn M Stone
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Lynn M Stone / Eyelash viper coiled {Bothrops schlegeli} captive
Eyelash viper {Bothrops schlegeli} on Heliconia Esmeraldas, Ecuador - Pete Oxford
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Pete Oxford / Eyelash viper {Bothrops schlegeli} on Heliconia Esmeraldas, Ecuador
Eyelash viper {Bothrops schlegeli} on Heliconia,  Esmeraldas, Ecuador - Pete Oxford
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Pete Oxford / Eyelash viper {Bothrops schlegeli} on Heliconia, Esmeraldas, Ecuador
Bornean keeled pit viper (Tropidolaemus subannulatus) in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia. - Duncan Murrell
01630895
Duncan Murrell / Bornean keeled pit viper (Tropidolaemus subannulatus) in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia.
Sri Lankan green pit viper (Trimeresurus trigonocephalus). Laxapana Falls, Sri lanka. - Duncan Murrell
01630868
Duncan Murrell / Sri Lankan green pit viper (Trimeresurus trigonocephalus). Laxapana Falls, Sri lanka.
Sri Lankan Green Pit Viper (Trimeresurus trigonocephalus). Laxapana Falls, Sri lanka. - Duncan Murrell
01630867
Duncan Murrell / Sri Lankan Green Pit Viper (Trimeresurus trigonocephalus). Laxapana Falls, Sri lanka.
Bornean keeled pit viper (Tropidolaemus subannulatus) in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia. - Duncan Murrell
01630835
Duncan Murrell / Bornean keeled pit viper (Tropidolaemus subannulatus) in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia.
Bornean keeled pit viper (Tropidolaemus subannulatus) juvenile in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia. - Duncan Murrell
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Duncan Murrell / Bornean keeled pit viper (Tropidolaemus subannulatus) juvenile in the Sabangau (peat-swamp) Forest, Central Kalimantan, Indonesia.
Sri Lankan Pit Viper (Trimeresurus trigonocephalus) Sinharaja, Southern Province, Sri Lanka - Lucas Bustamante
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Lucas Bustamante / Sri Lankan Pit Viper (Trimeresurus trigonocephalus) Sinharaja, Southern Province, Sri Lanka
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... - John Chan
01625449
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...
Vogel's pit viper (Trimeresurus vogeli) male in elevated rainforest habitat within the Bach Ma National Park in central Vietnam. Dry season. - Robert Valentic
01622159
Robert Valentic / Vogel's pit viper (Trimeresurus vogeli) male in elevated rainforest habitat within the Bach Ma National Park in central Vietnam. Dry season.
Hog-nosed pit viper (Porthidium nasutum)  Atlantic Lowland Rainforest, Costa Rica. - Melvin Grey
01617338
Melvin Grey / Hog-nosed pit viper (Porthidium nasutum) Atlantic Lowland Rainforest, Costa Rica.
Hognosed pitviper (Porthidium nasutum). Costa Rica. - Paul Hobson
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Paul Hobson / Hognosed pitviper (Porthidium nasutum). Costa Rica.
Fer-de-lance (Bothrops asper) snake resting on wood on forest floor. Costa Rica. - Paul Hobson
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Paul Hobson / Fer-de-lance (Bothrops asper) snake resting on wood on forest floor. Costa Rica.
White-lipped pit viper (Trimeresurus albolabris) Lantau Island, Hong Kong, China - Magnus Lundgren / Wild Wonders of China
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Magnus Lundgren / Wild Wonders of China / White-lipped pit viper (Trimeresurus albolabris) Lantau Island, Hong Kong, China
White-lipped pit viper (Trimeresurus albolabris) Lantau Island, Hong Kong, China - Magnus Lundgren / Wild Wonders of China
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Magnus Lundgren / Wild Wonders of China / White-lipped pit viper (Trimeresurus albolabris) Lantau Island, Hong Kong, China
Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) hanging from branch. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. - Magnus Lundgren / Wild Wonders of China
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Magnus Lundgren / Wild Wonders of China / Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) hanging from branch. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China.
Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) hanging from branch. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. - Magnus Lundgren / Wild Wonders of China
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Magnus Lundgren / Wild Wonders of China / Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) hanging from branch. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China.
Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. - Magnus Lundgren / Wild Wonders of China
01608061
Magnus Lundgren / Wild Wonders of China / Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China.
Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. - Magnus Lundgren / Wild Wonders of China
01608060
Magnus Lundgren / Wild Wonders of China / Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China.
Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. - Magnus Lundgren / Wild Wonders of China
01608059
Magnus Lundgren / Wild Wonders of China / Yunnan bamboo pitviper (Trimeresurus stejnegerii yunnanensis) camouflaged amongst leaves. Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China.
Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi. - Daniel  Heuclin
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Daniel Heuclin / Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi.
Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi. - Daniel  Heuclin
01607365
Daniel Heuclin / Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi.
Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi. - Daniel  Heuclin
01607364
Daniel Heuclin / Temple pitviper (Tropidolaemus subannulatus) portrait. Captive occurs in Philippines, Indonesia and Sulawesi.
Temple pitviper (Tropidolaemus subannulatus) Controlled conditions , occurs in Philippines and Indonesia. - Daniel  Heuclin
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Daniel Heuclin / Temple pitviper (Tropidolaemus subannulatus) Controlled conditions , occurs in Philippines and Indonesia.
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