Bee flies generally feed on nectar and pollen, some being important pollinators. The pollinating species have very long proboscises for delving into plants with long and narrow floral tubes. Larvae generally are parasitoids of other insects. They range from very small (2mm in length) to large, with a wingspan of some 40mm. When at rest, many species hold their wings at a characteristic ‘swept back’ angle.
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Hermanus, KarenFB, andylea and 63 more