Invasive species offer a rare research opportunity, as they often colonise new environments very different to their native habitat. One such species is the Jackson’s three-horned chameleon (Triocerus j. xantholophus), which was accidentally introduced to the Hawaiian Islands in the 1970s.
Our study, published today in Science Advances, shows Hawaiian chameleons display much brighter social signals than individuals from their native habitat range in East Africa – and could represent an example of rapid evolution.
