Prairie Rattlesnakes: Know the Facts. Prairie rattlesnakes are nocturnal and crepuscular, meaning they are most active during the night and at twilight. Their specialized heat-sensing pits allow them to detect the body heat of their prey, making it possible to hunt in complete darkness. Additionally, their unique eye design enhances their night vision, enabling them to navigate and hunt efficiently after the sun sets. Despite their preference for cooler, dim light, rattlesnakes also enjoy baskin