Chameleons live a tough life. Snakes, with their vicious venom and gaping jaws, slither around in search of the green lizards. Overhead birds threaten to swoop down and snag them for an afternoon ...

Even in the whimsical world of animated movies, dusty frontier towns in the American West aren't a tropical chameleon's native habitat. So when a grandiloquent green lizard has managed to install ...