Common names: desert massasauga, Edward's massasauga, Edward's rattlesnake. Sistrurus catenatus edwardsii is a subspecies of venomous pit viper in the family Viperidae. The subspecies is endemic to the southwestern United States and northern Mexico. In places its range overlaps that of S. c. tergeminus, and intergrading of the two subspecies is known.
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NocturnalNocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal",...
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OviparousOviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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PrecocialPrecocial species are those in which the young are relatively mature and mobile from the moment of birth or hatching. Precocial species are normall...
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PoisonousVenom is a type of poison, especially one secreted by an animal. It is delivered in a bite, sting, or similar action. Venom has evolved in terrestr...
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