Cheilosia latrans
Cheilosia latrans, the steely blacklet, is a very common species of syrphid fly observed in northern 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 nutrient-rich nectar and pollen. Larvae when known are plant feeders. References

Diptera of North America
Hoverflies of North America
Rhingiini
Insects described in 1849
Taxa named by Francis Walker (entomologist)