Canada
Thistle Stem Gall Fly (three photos)
Urophora cardui

This spiffy Fruit Fly was introduced to the U.S. to control
Canada Thistle.
I found it at Pineview Reservoir, Weber County, Utah.
©Carol Davis 6-3-2018

It isn't the fly itself that controls the thistle, but the
larva. The adults visit flowers. © Carol Davis 63-2018

This really is one of the most handsome of
the all the Fruit Flies; well, maybe not from
this angle. © Carol Davis 6-3-2018
Home - Insects and
Bugs of Utah
Other Home - Amazing Nature