Currently viewing the category: "Robber Flies"
What's That Bug? does not endorse extermination

Subject:  robber fly id
Geographic location of the bug:  barnegat new jersey
Date: 10/14/2018
Time: 08:26 PM EDT
Your letter to the bugman:  giant robber fly – asilidae family. but what genus species? promachus?? seent at cloverdale farm county park 7/28/18. i always have robber fly questions, any resources for field guides or at least to narrow down genera in nj?
How you want your letter signed:  WS

Giant Robber Fly

Dear WS,
We believe you are correct that this is a Giant Robber Fly in the genus
Promachus, and it looks most like Promachus hinei based on this BugGuide image, but that species is only reported as far east as Ohio on BugGuide.  It might be the same species as your previous submission.  You can try submitting your images to BugGuide to see if the network of contributors there can provide you with a species identity.

What's That Bug? does not endorse extermination

Subject:  Robber fly type
Geographic location of the bug:  monmouth county, new jersey
Date: 10/10/2018
Time: 04:09 PM EDT
Your letter to the bugman:  hey i am looking through archived photos and i would love more specific input on this robber fly. is it possible to id genus/species from this photo. taken mid june 2016. at the time i thought hanging thief but that’s as far as i got. thanks in advance!
How you want your letter signed:  WS

Giant Robber Fly

Dear WS,
We believe this is a Giant Robber Fly in the genus
Promachus, but we are not certain of the species.  See BugGuide for examples.

What's That Bug? does not endorse extermination

Subject:  Huge bee
Geographic location of the bug:  North Florida
Date: 09/24/2018
Time: 06:59 PM EDT
Your letter to the bugman:  This large bee thing buzzed my position.
How you want your letter signed:  Kurtz

Southern Bee Killer

Dear Kurtz,
This is not a Bee.  It is a Southern Bee Killer,
Mallophora orcina, or another member of the genus, and it is pictured on BugGuide.  It is a predatory Robber Fly that mimics a large Bee and that feeds primarily on Bees and Wasps as well as other large flying insects.  Based on data for BugGuide sightings, this is a late season sighting.

What's That Bug? does not endorse extermination

Subject:  Cannibal fly?
Geographic location of the bug:  Hudson River Valley, New York
Date: 08/26/2018
Time: 07:33 PM EDT
Your letter to the bugman:  Hello. I took this picture just hoping to get an up close pic of what I thought was some sort of horsefly. I zoomed in to find he was eating a smaller fly. He flew away with the fly right after I took the picture . Just wondering what it is . Thank you.
How you want your letter signed:  Thank you, Sanders Trippe

Robber Fly with Prey

Dear Sanders,
This is a Robber Fly with its Dipteran prey, but the dark color leads us to believe it is not a Red Footed Cannibalfly.

What's That Bug? does not endorse extermination

Subject:  Type of Fly?
Geographic location of the bug:  Charlotte NC
Date: 08/27/2018
Time: 08:20 AM EDT
Your letter to the bugman:  This guy was on our bedroom window when I opened the curtain this morning. I’ve tried all the bug guides but don’t see anything similar to even start looking. Is it some kind of fly?
How you want your letter signed:  Thank you!

Red Footed Cannibalfly

This predatory Robber Fly is one of the Giant Robber Flies in the genus Promachus, probably a Red Footed Cannibalfly.

What's That Bug? does not endorse extermination

Subject:  What is it?
Geographic location of the bug:  Southern California
Date: 08/22/2018
Time: 01:10 AM EDT
Your letter to the bugman:  Hi, my sister sent me these photos of what looks like a furry dragonfly.  I did a bit of research and found that it looks similar to a red footed cannibalfly…. what do you think?
How you want your letter signed:  Astrid

Robber Fly

Dear Astrid,
This is a large Robber Fly, judging by the ash seed used as scale, but it is not a Red Footed Cannibalfly, an eastern species.  It looks similar to this
Machimus species pictured on the Natural History of Orange County site, but we cannot state for certain that is a correct genus identification.

What's That Bug? does not endorse extermination