Some where, some where brought to the island like the iguanas. They are a major pest. Our Coqui which is a tree frog is native to PR, we say..... I am as Puerto Rican as the Coqui. However it was somehow introduced into Hawaii and they have more Coqui than PR, they consider it a pest and sometimes property values go down in Hawaii if the area has Coquis due to the noise. Weird, we love to sleep listening to the crickets and Coqui. They hate it.