Proctacanthus milbertii

This species is common throughout most of the state and is one of the most widely distributed robber flies in the United States. It has a loud buzz as it flies when disturbed and if a person was not familiar with robber flies, I am sure they think that it might be a bee or wasp. This is a large fly and preys on a variety of prey including large grasshoppers and bumblebees. It also is somewhat variable in coloration.

Locations

Map showing sighting locations for Proctacanthus milbertii
Map key
Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii female with prey.

Petenwell Dam west dike, August 17, 2005.

Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii male

Greenwood Refuge, August 6, 2008.

Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii female with prey (bombus sp.)

South of Redgranite, Willow Creek Fishery Area, August 6, 2007.

Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii male

South of Coloma, Chaffee Creek Fishery Area, August 3, 2007.

Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii male

Germania Marsh, August 1, 2007.

Proctacanthus milbertiiClick to enlarge

Proctacanthus milbertii mated pair with female feeding on prey.

Petenwell Dam west dike, August 17, 2005.