The March 2001 issue of
Scientific American has an article on this.
It describes a family of anole lizards in the Caribbean. Each island has a set of specialized lizards dwelling in different habitats, like on the trunks of trees, in the grass and in the forest canopy. According to the article, these lizards have all developed on the islands separately, as DNA tests show that lizards on each island are more closely related than similar specialists on other islands. Nonetheless, the same specialists on different islands look almost identical.