Fig. 7

Roll angle of snake P42, a Burmese python (Python bivittatus) in Everglades National Park, South Florida, USA, showing a unique, 2-h long behavioral event during which the snake displayed abnormal body postures, and rolled over completely at two separate times. Snake head schematics represent the approximate roll angles shown in the data trace below. Note that head schematics are used for roll visualization, but the actual roll angle was measured in the posterior third of the snake’s body where the ADL was implanted. Data at the far left and right sides of the top panel represent typical body position with low variation in roll