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30 May 2007, New Brunswick, Canada. Length 9.5mm
Feeding on sugar solution soaked into a board - the only way to keep it still!

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Tony

I think it's Chrysomyia.

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I don't find the genus Chrysomya listed for North America --- our common representative of Chrysomyinae is Chochliomyia. Perhaps I have out of date names?

I confess that I'd call it Lucila with out looking too carefully and based on superficial appearance.

If you can make out a few details in these (or other) photos, the key at
http://www.nku.edu/~biosci/CoursesNDegree/ForensicFlyKey/species.htm
might be helpful.

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I am certainly no expert, but I was going on the black edges to the tergites, the more projecting facial profile and the way the antennae are held - all suggested Chrysomia to me, but I am by no means certain. I thought one of the common Chrysomia's was worldwide nowadays? I'll have to look it up though.

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Thanks Susan for the suggestion. Once one has a name it's reasonably easy to do a search. It seems that Chrysomya spp. are now in NA but the only one that reaches Canada is C. rufifacies. Found some images of that species but my fly's face doesn't appear to match - body looks close.
Thanks Steve, I have the specimen and will run it through the key you referenced.
Update: keys to Lucilia illustris; if only all keys were that easy to use