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    • Crotalus Oreganus
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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...
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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...
Pacific Rattlesnake (Crotalus oreganus) in defensive posture, Carrizo Plain National Monument, California
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Jeff Foott / Pacific Rattlesnake (Crotalus oreganus) in defensive posture, Carrizo Plain National Monument, California
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...
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...
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.
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.
Juvenile Western rattlesnake (Crotalus viridis oreganus) Grant County, Washington. October.
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Gerrit Vyn / Juvenile Western rattlesnake (Crotalus viridis oreganus) Grant County, Washington. October.
Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
Arizona black rattlesnake (Crotalus cerberus) rattling tail, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) rattling tail, Arizona, USA, September. Controlled conditions.
Northern Pacific Rattlesnake (Crotalus viridis oreganus) San Jose, California, USA, April.
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Chris Mattison / Northern Pacific Rattlesnake (Crotalus viridis oreganus) San Jose, California, USA, April.
Northern Pacific Rattlesnake (Crotalus oreganus oreganus) flicking tongue in defensive posture, Barker Canyon Road, Grand Coulee, Grant County, Washington
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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
Midget Faded Rattlesnake (Crotalus viridis concolor) defensively coiled. Garfield County, Colorado, USA, June.
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Doug Wechsler / Midget Faded Rattlesnake (Crotalus viridis concolor) defensively coiled. Garfield County, Colorado, USA, June.