Fig. 2. (A) Force platform used to measure dynamics of climbing geckos Hemidactylus garnotii. (B) Axis conventions used in this study. Positive fore–aft forces (+x; blue) correspond to wall reaction forces that would accelerate a mass upwards. The force of gravity acts in the –x direction. Positive normal forces (+y; red) correspond to wall reaction forces that would accelerate a mass away from the force plate, whereas negative normal forces (–y) correspond to wall reaction forces that would accelerate a mass towards the force plate. The z axis was the lateral dimension and corresponds to forces directed to the animals right or left. Positive lateral forces (+z; green) correspond to wall reaction forces that would accelerate a mass to the animal's right, whereas negative lateral forces (–z) correspond to wall reaction forces that would accelerate a mass to the animal's left.