Movie 2

Recording of typical rattlesnake behavior when pendulum and background exhibited no thermal contrast (both pendulum and background at 30 °C)

Cooler snakes respond more strongly to infrared stimuli, but we have no idea why

George S. Bakken, Hannes A. Schraft, Robert W. Cattell, Donna B. Tiu, and Rulon W. Clark

Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.182121