Most of these fatalities are the result of delays from seeking medical treatment. Crotalus scutulatus is viviparous, giving birth to live young in late July or August, often coinciding with the summer monsoons. The Mojave Rattlesnake also has an extensive range in the northern half of Mexico. In Texas, however, Crotalus scutulatus is restricted to the western edges of the state, from El Paso to the Big Bend. This project funded by the University of Texas College of Natural Sciences and the Texas Memorial Museum .
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