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Coenosia tigrina
Tiger Fly with ashy gray body and red eyes. Average size approxiamately 10-12mm long.
Fennel frond in urban vegetable garden.
That is amazing that you can ID it from the wings! I had someone do that with a bee once.
You're welcome :) If you hadn't had such a clear picture of the wings, I wouldn't have felt safe making the suggestion, so pat yourself on the back!
Hi! Neither Wiki nor EOL has a description of this predatory fly. While trying to i.d., I compared wing veining on Bug Guide. It does range through California, and is found internationally. http://bugguide.net/node/view/518144