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...
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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...
01523722
Gerrit Vyn / Western rattlesnake (Crotalus viridis oreganus) Grant County, Washington, USA, October.
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Gerrit Vyn / Western rattlesnake (Crotalus viridis oreganus) Grant County, Washington, USA, October.
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Gerrit Vyn / Juvenile Western rattlesnake (Crotalus viridis oreganus) Grant County, Washington. October.
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Chris Mattison / Northern Pacific Rattlesnake (Crotalus viridis oreganus) San Jose, California, USA, April.
00537035
James Christensen / Northern Pacific Rattlesnake (Crotalus oreganus oreganus) flicking tongue in defensive posture, Barker Canyon Road, Grand Coulee, Grant County, Washington
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Michael D. Kern / Northern pacific rattlesnake (Crotalus oreganus oreganus) on road, California, USA
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Michael D. Kern / Northern Pacific Rattlesnake {Crotalus oreganus oreganus} captive, from Central and Northern California, USA
01148604
David Kjaer / Northern Pacific Rattlesnake {Crotalus viridis oreganus} Captive
01158128
David Welling / Northern pacific rattlesnake {Crotalus viridis oreganus} captive, from NW USA
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James Christensen / Northern Pacific Rattlesnake (Crotalus oreganus oreganus) flicking tongue in defensive posture, Barker Canyon Road, Grand Coulee, Grant County, Washington
