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The bee hummingbird (Mellisuga helenae) is endemic to Cuba and is the smallest bird in the world and smallest known dinosaur. This immature male has yet to develop the iridescent blue plumage of the adult. The bee hummingbird feeds mainly on nectar, probing deep into flowers with its bill and moving its tongue rapidly in and out. In the process of feeding, the bird picks up pollen on its bill and head. As it flies from flower to flower, it transfers the pollen, and in this way plays an important role in plant reproduction. In one day, the bee hummingbird may visit 1,500 flowers.Photograph credit: Charles J. Sharp
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