Efferia nemoralis

Efferia nemoralis is a species of robber fly in the family Asilidae, commonly known as the Woodland Hammertail. It is one of approximately 80 species in the genus Efferia, which is distributed primarily in the Americas. The species was originally described as Erax nemoralis by Hine in 1911 and later transferred to Efferia. Like other robber flies, it is a predatory insect that captures prey in flight.