Asilus sericeus

This was one of the first robber flies that I learned when I took a photo of the one that captured a Little Wood-Satyr. This is a fairly distinctive robber fly, long and slender, especially the female with the long pointed abdomen.

Identifying characteristics

This is mainly a brownish robber fly with very light yellowish brown legs, somewhat darker wings, and a very long, thin abdomen.

Similar species

None in Wisconsin.

Habitat

Woodland edges.

Flight

mid-June through mid-July.

Abundance

Not very common, but widespread in central Wisconsin. I have only seen two in one day twice.

Locations

Map showing sighting locations for Asilus sericeus
Map key
Asilus sericeusClick to enlarge

Asilus sericeus female with a little wood-satyr as prey.

Cedar Creek Fishery Area, July 5, 2004.

Asilus sericeusClick to enlarge

Asilus sericeus female

Greenwood Refuge, July 21, 2008.

Asilus sericeusClick to enlarge

Asilus sericeus female

Rocky Run SNA, June 29, 2006.

Asilus sericeusClick to enlarge

Asilus sericeus male

Near Brooks Bluff, June 22, 2007.