 Over a longer period, however, their legs become shorter, which are better suited for perching on smaller branches higher off the ground, out of reach for the curly-tailed lizard.When brown anoles are introduced to small islands with low vegetation, their legs become shorter, better suited for rapidly moving among the shrunken shrubbery to catch insects and avoid predatory birds.Furthermore, in a study where brown anoles were introduced to seven small, anole-free Bahaman islands (anoles had disappeared because of Hurricane Frances), it was seen that—although all populations became shorter-legged within a few years—this was proportional to the leg-size of the founders.