Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData
Photo#1399712
Flies? - Eudioctria sackeni - male - female

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

Moved
Moved from Eudioctria.

Moved
Moved from Eudioctria sackeni.

Moved
Moved from Robber Flies.

 
Can you tell us...
...how 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...
...is 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. http://staff.royalbcmuseum.bc.ca/author/rbcm_robcannings/

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
Moved from ID Request.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.