Figure 5.

The angle of inclination (a) and perch roughness (b) of random potential perches (white) and perches used (grey) in urban populations, contrasting perch use by fast and slow lizards as a test of the habitat breadth and constraint hypotheses. Poorly performing lizards (slowest on the most challenging track, 60° concrete) used less vertical and rougher perches than were common while lizards that performed best (fastest on the most challenging track) did not discriminate based on either factor. Significance levels of contrasts to randomly available perches: p > 0.05 ‘n.s.’, p < 0.05 ‘*’.