Introduced in Toronto from Europe around 1885 (Skevington, 2019). Now widespread in North America and fairly common in Maryland. According to BugGuide, aquatic larvae are found in "shallow, nutrient rich standing water and in cow-dung, silage pits and compost heaps."
Typical large drone fly. Variable but usually with dark hourglass pattern on back. Identifiable from photos with care by leg, abdominal, and face patterns.
There are 48 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 |