Dolichopodidae, the long-legged flies, make up a large family of true flies with more than 7,000 described species in about 230 genera distributed worldwide. The genus Dolichopus is the most speciose, with some 600 species. They are generally fairly small, metallic flies with large, prominent eyes but otherwise they show considerable variation: most have long legs but some do not. The males often have enlarged genitalia which can be useful for species recognition. The adults are predatory on other small animals.
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