Jackson's Chameleon (Trioceros jacksonii), native to East Africa but introduced into Hawaii and Florida. Only males have the horns. They're popular as pets but not the easiest to keep. They dislike being handled, need solitude and are easily stressed.
Chamaeleo pardalis, chameleon species found in the forests of Madagascar. Chameleons can produce a wide range of colours and patterns on their skin, more to express mood than blend in the different environments - photo David Parks