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    • Southern Pacific Rattlesnake
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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...
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...
Southern Pacific Rattlesnake (Crotalus viridis helleri) in defensive position, Poway, California
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Richard Herrmann / Southern Pacific Rattlesnake (Crotalus viridis helleri) in defensive position, Poway, California
Southern Pacific Rattlesnake (Crotalus viridis helleri) coiled up showing head with sensory pit organ, North America
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ZSSD / Southern Pacific Rattlesnake (Crotalus viridis helleri) coiled up showing head with sensory pit organ, North America
Southern Pacific rattlesnake (Crotalus helleri) portrait, Ramona, California, USA.
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Lucas Bustamante / Southern Pacific rattlesnake (Crotalus helleri) portrait, Ramona, California, USA.