Robber Fly 7-22-09 - Efferia aestuans

Moved

… Herschel Raney, 1 November, 2009 - 5:34pm

Moved

… Ken Schneider, 19 August, 2009 - 5:34pm

Robber Fly 7-22-09

I think I found the answer in "Kaufman Field Guide to Insects of North America" by Eric R. Eaton and Kenn Kaufman, page 288. I quote, "Efferia is an enormous genus with 100 species in North America . . . Males have conspicuous bulbous claspers on the tip of the abdomen and are marked with dazzling silver bands."

This is a male Efferia. I'm not sure it can be traced down to a species?

Marcia

… Marcia Sessions, 23 July, 2009 - 7:37pm

A little different

Yours is different enough from the other two for even me to know they're probably not the same species. But it's a start.

… Mo Whalen, 24 July, 2009 - 1:11am

That's great info

Hey, hey, hey... (okay, bad reference to "what's happening")
I don't have that guide book but I use the Brock & Kaufman butterfly guide. I don't know much about robber flies yet other than what I've learned from others the last few months. ID requests and recent postings for Asilidae are helpful. So thanks for posting!!

I see you have other robber fly ID requests. Do you know you can tag the images and move them to the "Recent images" section of Asilidae and the robber fly experts are more likely to see them? A recent post suggested to put the unknown images as close as possible to the flies since the fly experts watch that closer. You could tag your fly ID Requests and move them here (click here), the base of Flies, if you're not even sure it's a robber. The Help tab has info on how to tag and "move tagged images" if your interested. I'm finally getting better at that.

For robbers, the info page for Asilidae (click here) has a link to another site (Asilidae Home Page) that has detailed info on robber flies and I think has links to many more sites. So much to learn!

… Mo Whalen, 24 July, 2009 - 1:09am

Maybe Efferia aestuans

Click image below for what looks to me to be a similar specimen. There was a similar post yesterday, click here for that one.

… Mo Whalen, 23 July, 2009 - 6:26pm

Maybe Efferia aestuans

Wow, Mo! All three look VERY much alike? Thank you. And, what is happening?

… Marcia Sessions, 23 July, 2009 - 6:33pm