In aggressive fights at the start of the breeding season, males butt their heads together to determine dominance. Females mate only once every two years, producing 20 – 25 eggs that incubate for a massive 20 months. The young are independent as soon as they hatch (3). A solitary species outside the mating season, this large chameleon hunts during the day for large insects and small vertebrates amongst the branches of trees. It is able to change colour in response to the temperature, its surroundings or the presence of other chameleons (3).