An adult western diamondback rattlesnake. Solitary outside of mating season, they are one of the more aggressive rattlesnake species found in North America because they rarely back away from confrontation. When threatened they usually coil and rattle to warn aggressors.

An adult western diamondback rattlesnake. Solitary outside of mating season, they are one of the more aggressive rattlesnake species found in North America because they rarely back away from confrontation. When threatened they usually coil and rattle to warn aggressors.

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An adult western diamondback rattlesnake. Solitary outside of mating season, they are one of the more aggressive rattlesnake species found in North America because they rarely back away from confrontation. When threatened they usually coil and rattle to warn aggressors.