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Dark Olive Duns

Like most common names, "Dark Olive Dun" can refer to more than one taxon. They're previewed below, along with 1 specimen. For more detail click through to the scientific names.

Mayfly Species Drunella coloradensis

These are very rarely called Dark Olive Duns.
This species is very similar to Drunella flavilinea. In areas where their ranges overlap, they can sometimes be found in the same streams. Allen and Edmunds (1962) say that Drunella coloradensis tends to favor colder water than Drunella flavilinea and that it may emerge as much as a month later.
Drunella coloradensis (Small Western Green Drake) Mayfly NymphDrunella coloradensis (Small Western Green Drake) Mayfly Nymph View 2 Pictures
Collected August 17, 2007 from in
Added to Troutnut.com by on June 26, 2011
See 2 more specimens...

Mayfly Species Siphlonurus rapidus

These are very rarely called Dark Olive Duns.
This species may reinforce spinner flights of Siphlonurus quebecensis and Siphlonurus alternatus.
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