However, the color change, in contrast to the chameleon's, is not, as many people think, relaed to the color of the background. Instead it is determined by such factors as light and temperature or by such emotions as fright, triumph, or defeat. The chameleon is an imal of the old world, whereas the anoles are found in the warmer regions of North and South America. The chameleon lays from two to forty eggs at a time, the anole only a single egg.