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> > Flavalinea or Drunella Grandis

ByhaughDecember 17th, 2013, 5:12 pm
Hawaii

Posts: 56
Hi,
Could you please determine which this is?
Thank you.

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KonchuDecember 17th, 2013, 6:46 pm
Site Editor
Indiana

Posts: 498
Where is this from?
TaxonDecember 17th, 2013, 8:10 pm
Site Editor
Plano, TX

Posts: 1323
Mack-

Roger will know for sure.


It is generally not productive to offer an opinion concerning the identity of a photo of a mayfly nymph, unless it has been photographed while fully immersed in water. Otherwise, all its appendages stick together, and it simply resembles a blob.

When in the field, a pickle jar lid is handy for that purpose.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
ByhaughDecember 17th, 2013, 11:14 pm
Hawaii

Posts: 56
It was from The Ranch on the Henry's Fork in Idaho
EntomanDecember 18th, 2013, 4:43 am
Northern CA & ID

Posts: 2604
Good guess as to genus, Mack. I have sampled the Henrys quite a bit, though it has been many years. If memory serves, the smaller flav species were mostly bland there. The bright mottled appearance was common with the big green drakes but it's what appears to be paired thoracic tubercle development that makes this specimen look more like an immature D. grandis (Green Drake) to me. This is only probable, though. Roger stated the difficulties with making determinations using this kind of photo very well so I won't comment further other than to express my agreement.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
EntomanDecember 18th, 2013, 3:04 pm
Northern CA & ID

Posts: 2604
How much color variation is common or normal in the Drunella group ???

All over the map, Mack. They are little chameleons and tend to take on the coloration of their surroundings. Mostly, they live in weeds or the detritus between rocks and so tend to shades of olive or brownish black. On less fertile streams full of assorted colorful rocks, these critters are just as varied. I've collected them in suits of granite looking salt & pepper and even bright chartreuse w/ black tiger stripes. Go to http://www.flyfishingentomology.com/forum/Topics_Display.php and check out the various Drunella photos there. Some are very colorful odd balls.:)
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

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