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Black diamond rattlesnake may refer to:
Crotalus o. oreganus, also known as the Pacific rattlesnake, a venomous pitviper subspecies found from British Columbia, Canada, south through the United States into California
Crotalus cerberus, also known as the Arizona black rattlesnake, a venomous pitviper species found in the southwestern United States
Crotalus helleri, also known as the Southern Pacific rattlesnake, a venomous pitviper species found in South-West California and south into Baja California
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