Fig. 1. An anterior, schematic view of potential effects of perch diameter on limb posture showing a sprawling limb (A) and a more upright limb posture on a wide (B) and narrow perch (C). The pelvic width, and lengths of the femur and tibia, are anatomically correct for A. sagrei. The transverse axis of the pelvis, femur and tibia, are all in the plane of the illustration. (D) The expected effects of perch diameter on hip height (*), and the clearance between the top of the perch and the ventral surface of the lizard when the limbs have the posture shown in A. The horizontal broken line indicates the length of the tibia.