Comments: Mostly crepuscular and nocturnal in summer, but active diurnally as well, especially in cooler months. In north, active mainly from April to late September or early October but may appear on surface during mild winter weather, especially in south (Tennant 1984). Active mainly March-October in southeastern Arizona (Beck 1995). In Chihuahua, active mainly July-September, with a peak in August (Reynolds, cited by Ernst 1992).
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