Our treasured Marisa Hendron, of Chrysalis Garden Care, is the fastest entomologist on the hill; she ID'ed this little guy as a Synanthedon, and was speculating perhaps bibionipennis? (as we've got beach strawberries).
Now pointed in the right direction (not hymenoptera), I found a bug that was an identical match! (and funny, found in England, Wales, and parts of Scotland...)
Before getting too excited about discovering a new species in the US, I checked BugGuide.net, and learned that this same Synanthedon tibuliformis has been spotted in Oregon, Washington, and BC.
Marisa will receive one of my "Celebrate Urban Birds" posters for her sleuthing efforts;
Thank you Marisa!