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Photo#1049912
Syrphid Fly-Brachypalpus femorata - Brachypalpus femorata - male

Syrphid Fly-Brachypalpus femorata - Brachypalpus femorata - Male
Husum, Klickitat County, Washington, USA
March 22, 2015
Size: 14mm
This fly was on pussy willows in a wetland/prairie remnant. I wonder what is the significance of it's large femurs?

Images of this individual: tag all
Syrphid Fly-Brachypalpus femorata - Brachypalpus femorata - male Syrphid Fly- Brachypalpus femorata Wing - Brachypalpus femorata - male Syrphid Fly- Brachypalpus femorata - head - Brachypalpus femorata - male

Adult Female!
Joy, if you still have this specimen, I suggest that you try to get an image of the head, from the front or the top. If you can clearly display the eye-gap to head-width ratios whenever you are submitting images of flies; you can [sometimes] more easily sex them and it helps with the overall taxon placement also. Of course, the abdomen, thorax and legs are just about as important and sometimes those images are also very badly needed, for the BugGuide. Yes, I keep running into your images and they are always very nice! Thanks

 
Head shot
Hi Bob;
Thanks for your interest and encouragement! I appreciate learning about how specimens are IDed. When I first joined Bug Guide I was stuck on thinking insect identification was made from dried specimens so I took photos of some specimens from my collection (I enjoyed seeing physical details under the microscope)and created illustrations but it seemed that editors preferred outdoor photographs. It was then that I found out how much fun it is to see the details in photos and have enjoyed it ever since. However I continue to collect voucher specimens when possible in hopes that some day I will learn complicated body parts. Entomology is amazing. Gratefully, Joy

 
Adult Male!
Joy, that is an excellent shot and you can clearly see the thinness of the eye gap and also the kink in the eye angle, just above the antenna. On the females, the eye angle is straight, all the way to the top. Here is an example of a female. NOTE: This image is not yet sexed, but you can obviously see the difference:


I'm very glad to see any of your images and I will try to help, when I can. Thanks

Brachypalpus femorata
This is a nice picture of Brachypalpus (Crioprora) femorata. This is about the earliest they will start flying.

The males have enlarged hind femora to grasp tightly onto the female. This trait has evolved multiple times in Syrphidae.

Moved
Moved from subgenus Crioprora.

Moved
Moved from ID Request.

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