Figure 24: Searching for lizards may have resulted in changes in lizard movement patterns.  To test the effects of human foot-fall disturbance by removing ground vibration caused by walking, we constructed a “catwalk”. We simultaneously released 8 lizards in the center of a 9 m² area.  The area was bounded by the “catwalk” made of four 3m-long wood boards supported by four hay bales.  Movements of lizards were monitored from atop the catwalk without entering the area on foot.  We repeated the experiment twice with inconclusive results.