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Photo#1436623
black robber flies mating - Promachus atrox - male

black robber flies mating - Promachus atrox - Male
Gentry Creek, 5700 ft elev, Gila County, Arizona, USA
September 3, 2017
Size: 3 cm
I believe these are Promachus atrox. Confirmation would be appreciated. Thanks.

Moved
Moved from Giant Robber Flies.

Probably
atrox. Male male interaction. One being eaten or the upper male made the mating flight over the lower male and this is a brief and bloodless encounter.

 
Thanks Herschel. When I real
Thanks Herschel. When I realized they were both males, I wondered about this. Thing is, I encountered them without my camera, then took at least 5 minutes to get the camera and get back. They were laying on the ground in exactly the same place. It was NOT brief, so I presume NOT bloodless either. I know odonates eat their own species (I have pictures), but didn't realize robber flies also do this.

Moved
Moved from ID Request.

I think that you have the correct species, but let's wait for an expert.

Looks like...
Two white flags = ♂♂

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