A couple Barnes Creek (Lake Crescent trib) insects

#1
The lid is a standard size pickle jar lid, to give you scale. This was a good sized "blue wing olive" - but not the usual I'm used to seeing as it had three tails. It was also fairly large, a solid #16 or slightly larger. The dun wings were, as you can see, pretty large as well. Can you precisely identify this one?



And, turning over rocks revealed a number of immature nymphs. This one, however, seemed to be ready-to-go with a wing case that was looking like it was darkening. I was thinking Ephemerella, but it doesn't seem elongated enough and had more pronounced gills than I'd have expected based on images I've seen. The width of the head, pronounced eyes, and the pronounced gills now have me thinking it is some sort of Epeorus (yellow quill) - and there were in fact good sized yellow mayflies coming off at about a size 14 that I was thinking may very well be yellow quills. So, how about this nymph?

 

Taxon

Moderator
Staff member
#2
Hi Jim-

I believe your winged mayfly to be of family Ephemerellidae and of genus Drunella, and your mayfly nymph to be of family Heptageniidae, not genus Epeorus as they have only 2 tails, but rather, Rhithrogena robusta. Incidentally, good on you for taking the pickle jar lid.:)
 
#3
Drunella, huh? So, these were not BWOs of some sort, but rather small, lesser green drakes? I'd guess, for these western waters and the size of this one, and given some photos I just looked up, Drunella flavilinea? Very interesting! Thank you!

Aha, yes, I see that Epeorus indeed have just two tails, I wasn't paying close enough attention. And, the photo I got matches well with this one from Bob Henricks (http://www.flickr.com/photos/[email protected]) on Flickr (man, this guy has a lot of bug photos, it's pretty apparent he has a bunch of aquariums full of insects, and he's nice too, having set the rights on the images so they can be used in my online hatch charts):





Thanks Taxon, cheers.
 
#4
I was just reading about Drunella the other day. I thought that flavs didn't really start coming off until a little later into summer? Could it be drunella doddsii?
 

Taxon

Moderator
Staff member
#6
I was just reading about Drunella the other day. I thought that flavs didn't really start coming off until a little later into summer? Could it be drunella doddsii?
That is possible, as the following Drunella species are known to be present in Clallam County:

Drunella coloradensis Boulder Cr
Drunella coloradensis Boundary Cr
Drunella coloradensis Ennis Cr
Drunella coloradensis Kugel Cr
Drunella coloradensis Morse Cr
Drunella coloradensis South Branch Little R
Drunella doddsi Boundary Cr
Drunella doddsi Cook Cr
Drunella doddsi Cool Cr
Drunella doddsi Couger Cr
Drunella doddsi Deep Lake Cr
Drunella doddsi Dungeness R
Drunella doddsi Jimmy Come Lately Cr
Drunella doddsi Lake Sutherland
Drunella doddsi Morse Cr
Drunella doddsi Mud Cr
Drunella doddsi Salt Cr
Drunella doddsi South Branch Ellen Cr
Drunella doddsi South Branch Little R
Drunella doddsi South Fork Soleduck Cr
Drunella doddsi Steamboat Cr
Drunella doddsi Upper Deep Cr
Drunella flavilinea Morse Cr
Drunella flavilinea Soleduck R
Drunella grandis Dungeness R
Drunella grandis East Fork Dickey R
Drunella grandis Morse Cr
Drunella spinifera Boulder Cr
Drunella spinifera Ellen Cr
Drunella spinifera Ennis Cr trib
Drunella spinifera Indian Cr
Drunella spinifera Lake Deep Cr
Drunella spinifera Mud Cr
Drunella spinifera Soleduck R
Drunella spinifera South Branch Little R
 

Jim Wallace

Smells like low tide.
#7
Ok, I ascertain that there's 2 of the above Drunellas (doddsi and grandis) in the Dungeness R. Do those have "common" names that might ring a bell? I plan to be fishing the upper river this summer.

I think I know my pickle jar lids, though. From the blue rim, I'd say that was from a Vlasic brand pickle jar.
 

Taxon

Moderator
Staff member
#9
Hi Jim-

In their book, Western Mayfly Hatches, Rick Hafele and Dave Hughes refer to them thusly:

Greater Drunella
(Western Green Drakes)
D. grandis, D. doddsi (now D. doddsii) , D. spinifera
Smaller Drunella
(Flavs, Lesser Green Drakes)
D. flavilinea, D. coloradensis
 

Jim Wallace

Smells like low tide.
#10
Thanks Robert. I need to pick up a copy of that book. And maybe any other field guides to Western bugs and hatches.

But today is a surf day. :cool: gotta go!
 

Latest posts