Can be very common in open habitats. This species lands on whatever surface is convenient, and may even land on observers. The genus Efferia s.l. is quite speciose, and some dipterists split it up into a number of smaller genera. Following that classification, this species would be placed in Nerax.
Female has long, distinctive ovipositor.
There are 31 records in the project database.
GA | AL | WA | FR | CL | MO | HO | BA | BC | HA | CE | PG | AA | CV | CH | SM | KE | QA | CN | TA | DO | WI | SO | WO |