Fig. 7.

Arboreal locomotion of a brown tree snake (B. irregularis, approximate L = 135 cm) on smooth cylinders based on (Jayne and Byrnes 2015). (A) Lateral undulation on horizontal cylinders. (B) Concertina locomotion climbing up a vertical cylinder. For each combination of cylinder diameter and incline, a pair of images shows the overhead and lateral views. All of the cylinders were covered with duct tape, and the reference lines on the cylinder indicate 10 cm intervals. The diameters of the cylinders were 0.6, 1.6, 4.1, 8.9, and 15.9 cm. Note the varying extent to which the body of the snake encircles the cylinder and conforms to its shape.