Most flowering plants depend on animals for pollination. In warm wet tropical regions, more than 90% of plant species are pollinated by animals. In Dominica, a Caribbean island country, researchers have identified a mutualistic relationship between two species of heliconia plant (Heliconia bihai and H. caribaea) and their hummingbird pollinator, the Purple-throated carib (Eulampis jugularis). The association is so specific that it has often been cited as an example in the scientific literature.