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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Robber Flies (Asilidae) » Asilinae » Giant Robber Flies (Promachus) » Promachus nigrialbus
Photo#222375
Giant Robber Fly - Promachus nigrialbus
Copyright © 2008 Carol L. Rollins

Giant Robber Fly - Promachus nigrialbus
West of Benson, Cochise County, Arizona, USA
September 1, 2008
I believe I have matched this one to an image and description in the "National Audubon Society Field Guide to the Southwestern States."
They call it a Giant Robber Fly. I spotted this one at around 3:00 pm on an Agave plant in my front yard, 4,600 elevation in a rural desert area.

Images of this individual: tag all
Giant Robber Fly - Promachus nigrialbus Giant Robber Fly - Promachus nigrialbus
Contributed by Carol L. Rollins on 6 September, 2008 - 3:04pm
Last updated 21 October, 2020 - 10:42am

Moved
Moved from Robber Flies.
… Herschel Raney, 8 September, 2008 - 6:48am

 
Promachus nigrialbus
Thank you Herschel.
… Carol L. Rollins, 8 September, 2008 - 7:17am

Robber
Appears to be a very trim male Promachus with that white terminal hairiness. Impressive thing. It is not a species I know. I will check the key later.

I can't make this into anything but Promachus nigrialbus. Nice shot.
… Herschel Raney, 6 September, 2008 - 7:54pm

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