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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.

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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