Efferia tabescens

Efferia tabescens is a species of robber fly (family Asilidae) described by Nathan Banks in 1919. The common name "Sesqui Hammertail" refers to this species. Robber flies in the genus Efferia are predatory insects that capture other insects in flight. The species has been documented through 143 iNaturalist observations, indicating it is moderately well-recorded in citizen science databases. As a member of the Asilidae, it shares the family's characteristic predatory behavior and robust body form adapted for aerial hunting.