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Flies? - Eudioctria sackeni - male - female

Flies? - Eudioctria sackeni - Male Female
Metro Vancouver, British Columbia, Canada
July 1, 2017

Moved from Eudioctria.

Moved from Eudioctria sackeni.

Moved from Robber Flies.

Can you tell us... you arrived at the species-level ID? E. nitida is quite similar and is also found in your area.

To be honest
I actually didn't identify it myself -- another naturalist in BC suggested the ID, and I assumed he was correct. I can ask what he used to differentiate the two (although, maybe I'm missing something, but E. nitida does seem to have much darker wings… I have additional photos if needed, of individuals not mating).

If the other naturalist... an Ashlid specialist, then I will certainly defer to him, no questions asked. :)

If not, however, I'd prefer to see the specimen moved back pending expert review. It's entirely your call, though.

Turns out the brother of the identifier
does specialize in robberflies.

I believe they help each other out with identifications, as I've seen him write elsewhere "identified by my brother ___".

If you're satisfied that the ID is solid...
...feel free to move to pics back to species.

Okay, I'm going to move it back.
I heard back from another person, who says:

"an important field mark for them is the colour pattern of the yellow and black on the legs. The most similar species in our area is Eudioctria nitida. Nitida has a fully black femur and mostly orange tibia, but sackeni either has orange on the underside of the front+middle femur (like yours does) or a black femur with mostly black tibia"

I do understand the need to be cautious on making an initial ID like this though, so thank you for that!

No worries
I moved it back to genus level. I will ask for what he used to make the ID though.

Moved from ID Request.

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