Now That's a Fly!

Jul 25, 2011

Oh, to go through life being called a "short fat fly."

Such is the case with a specific tachinid fly (family Tachinidae, genus Gymnosoma), which we spotted on a coreopsis (aka tickseed) growing along a Fort Bragg cliff. 

It's an odd-looking fly. Its abdomen resembles a ladybug or lady beetle. Its head--definitely a fly. (Gymno is Greek for naked, and soma means body.)

"Its larvae are parasites on stink bugs," said native polliantor specialist Robbin Thorp, emeritus professor of entomology at the University of California, Davis.

Check out another image on bugguide.net.

Well, it's good that this ladybug mimic rids the world of a few more stink bugs!


By Kathy Keatley Garvey
Author - Communications specialist

Attached Images:

Short fat fly (genus Gymnosoma) on coreopsis at Fort Bragg. (Photo by Kathy Keatley Garvey)

Short fat fly (genus Gymnosoma) on coreopsis at Fort Bragg. (Photo by Kathy Keatley Garvey)

The larvae of this

The larvae of this "short fat fly" feed on stink bugs. (Photo by Kathy Keatley Garvey)