What's That Bug? does not endorse extermination

What is this fly?
Wed, Jun 3, 2009 at 8:59 PM
I took this photograph at 4:27 pm June 03, 2009 in the Central Okanagan region of British Columbia. The area it was specifically taken in is characterized by grasses and sagebrush. The temperature was about 30 C and sunny. The fly appeared to be feeding on the flower it is currently sitting on (a popular choice as several other bugs were photographed on the same type of flower).
Scott Thomson
Westbank, British Columbia, Canada

Tachinid Fly

Tachinid Fly

Dear Scott,
This is a Tachinid Fly in the genus Cylindromyia, according to images posted to BugGuide, which indicates they are a “common flower visitor in open weedy areas. ”  Of Tachinid Flies in general, BugGuide indicates:  “Larval stages are parasitoids of other insects. Almost every order of insects is attacked by tachinids, including a few types of non-insect arthropods. Some tachinids are very specific and others can parasitize a wide variety of hosts. The most common hosts are caterpillars” and “Most tachinids deposit their eggs directly on the body of their host, and it is not uncommon to see caterpillars with several tachinid eggs on them. Upon hatching the larva usually burrows into its host and feeds internally. When fully developed it leaves the host and pupates nearby. Some tachinids lay their eggs on foliage; the larvae are flattened and are called planidia; they remain on the foliage until they find a suitable host. ”  Since we will be out of the office for a week, we are setting your letter to post live on Saturday at noon.

What's That Bug? does not endorse extermination

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