Robber Fly (Efferia sp.)with Caggage White butterfly.
Cottonwood Bridge SP, Sherman County, Oregon.
Robber Fly (Efferia sp.)with Caggage White butterfly.
Cottonwood Bridge SP, Sherman County, Oregon.
Robber Fly (Efferia sp.)
Lower Klickitat River, Klickitat County, Washington.
Stenopogon rufibarbis M?,
Jenny Creek Road, Cascade-Siskiyou NM, Jackson County, Oregon. 6/22/21
Stenopogon rufibarbis M?,
Jenny Creek Road, Cascade-Siskiyou NM, Jackson County, Oregon. 6/22/21
Stenopogon rubibarbis M?
Stenopogon rubibarbis F?,
Jenny Creek Road, Cascade-Siskiyou NM, Jackson County, Oregon. 6/22/21
Stenopogon inquinatus?,
Jenny Creek Road, Cascade-Siskiyou NM, Jackson County, Oregon. 6/22/21
Stenopogon inquinatus?,
Frissell Ridge, Lane County, Oregon. 7/16/22
Machimus occidentalis? feeding on a fly.
Metolius River, Jefferson County, Oregon. 7/8/22
Robber Fly (Stenopogon sp.)
Conboy NWR area, Klickitat County, Washington. 6/16/23
Robber Fly (Stenopogon sp.)
Conboy NWR area, Klickitat County, Washington. 6/16/23
Bee-mimic Robber Fly (Laphria sp.)
Satus Pass, Klickitat County, Washington. 6/30/23
Bee-mimic Robber Fly (Laphria sp.)
Satus Pass, Klickitat County, Washington. 6/30/23
Bee-mimic Robber Flies (Laphria sp.) mating.
Cottonwood Bridge SP, Sherman County, Oregon. 6/7/21
Bee-mimic Robber Fly (Laphria sp.)
Lookout Mountain, Hood River County, Oregon. 8/8/22
Bee-mimic Robber Fly (Laphria sp.)
SE of Mt. Hood, Clackamas County, Oregon. 7/28/23
Cryptopogon spp.
Lower Klickatat River, Klickitat County, WA. 6/27/22
Neomochtherus willstoni
Satus Pass, Klickitat County, WA. 6/30/23
Lookout Mountain, Hood River County, Oregon. 8/8/22
Note: Like dragonflies, robber flies are predatory insects but they suck the fluids from their prey rather than eat them. They capture a variety of other insects, though some groups tend to specialize on certain insects such as bees. In turn, they can fall prey to larger predators, even larger specimens of the same species. These are very interesting insects yet tend to go unnoticed by most people.
I have yet to find a satisfactory guide or website that covers northwest species so have had to use online sources like iNaturalist, BugGuide, and Gary Lasley's Nature Photograpy filtering on Northwest locations. Consequently, my identification can only be tentative.
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