Cheilosia orilliaensis explained

Cheilosia orilliaensis, the black-backed blacklet, is a common species of syrphid fly observed across North America. Hoverflies can remain nearly motionless in flight. The adults are also known as flower flies for they are commonly found on flowers, from which they get both energy-giving nectar and protein-rich pollen. Larvae when known are plant feeders.^{[1] [2] [3]}

Notes and References

1. Rotheray . G.E. . 1993 . Colour Guide to Hoverfly Larvae (Diptera, Syrphidae) in Britain and Europe . Diperists Digest . 9 . 155 .
2. Hull . Frank Montgomery . 1950 . The genus Cheilosia Meigen (Diptera, Syrphidae). The subgenera Cheilosia and Hiatomyia . Bulletin of the American Museum of Natural History . 94 . 299–402 . 2246/1001 .
3. Book: Skevington, Jeffrey H . 2019 . Field Guide to the Flower Flies of Northeastern North America. . 9780691189406 .