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Drosophila is a genus of small flies, belonging to the family Drosophilidae, whose members are often called "fruit flies," or more appropriately vinegar flies, wine flies, pomace flies, grape flies, and picked fruit-flies, given as how many species linger around overripe or rotting fruit. A second, related fly family, the Tephritidae, are also called fruit flies; these feed primarily on unripe or ripe fruit, with many species being regarded as destructive agricultural pests, especially the Mediterranean fruit fly. One species of Drosophila in particular, D. melanogaster, has been heavily used in research in genetics and is a common model organism in developmental biology. Indeed, the terms "fruit fly" and "Drosophila" are often used synonymously with D. melanogaster in modern biological literature. The entire genus, however, contains about 1,500 species and is very diverse in appearance, behavior, and breeding habitat. Scientists who do research on Drosophila are often called Drosophilists.