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
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