Robber flies eat biting flies and other flying insects. They chase them in flight, overtake them and suck out the victim's insides after stopping on a branch or leaf.
They make a loud whirring noise as they fly because they beat their wings so quickly.
Common name: Robber Fly (Efferia)
Scientific Name: Efferia pogonias
Other Names: Robber fly
Adult Size (Length): 13mm to 19mm (0.51in to 0.75in) [ COMPARE ]
Identifying Colors: white; black; gray; brown
North American Reach (Though Not Limited To*): Arizona; New Mexico; Texas; Mississippi; Alabama; Georgia; Florida; South Carolina; North Carolina; Tennessee; Kentucky; Virginia; West Virginia; Oklahoma; Arkansas
* Insects are not governed by lines on a map and therefore may appear in areas/regions/states beyond those listed above.Text ©2005-2014 www.InsectIdentification.org • All Rights Reserved • No Reproduction Permitted