Bibio, March flies or St. Mark's flies, is a genus of flies (Diptera).
Bibio larvae live in grassy areas and are herbivores and scavengers feeding on dead vegetation or living plant roots. Some species are found in compost.[1]
In some areas, Bibio flies are regular flower visitors and they are suggested to be pollinators of several plant species,[2][3] such as hogweed (Heracleum sphondylium) and mouse-ear hawkweed (Hieracium pilosella).[4]
Bibio flies also show strong sexual dichotomy, with males and females having significant differences in body morphology.
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