Small Western Green Drakes

Mayflies

Caddisflies

Stoneflies

Scientific Names

Match	Scientific Name
	Drunella coloradensis
	Drunella flavilinea
	Drunella spinifera

Like most common names, "Small Western Green Drake" can refer to more than one taxon. They're previewed below, along with 5 specimens. For more detail click through to the scientific names.

Mayfly Species Drunella coloradensis

These are often called Small Western Green Drakes.

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 Nymph

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Collected August 9, 2011 from in
Added to Troutnut.com by on August 9, 2011

See 2 more specimens...

Mayfly Species Drunella flavilinea

These are often called Small Western Green Drakes.

The Flavs pick up about a week after the closely related but larger Western Green Drakes (Drunella grandis and Drunella doddsii) finish hatching on most Western waters.

Their hatches may be complemented by simultaneous hatches of two less prolific species, Drunella coloradensis and Drunella spinifera.

Drunella flavilinea (Flav) Mayfly Dun

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Collected July 31, 2010 from in
Added to Troutnut.com by on June 29, 2011

Mayfly Species Drunella spinifera

These are very rarely called Small Western Green Drakes.

This taxon prefers cold water and does not flourish where water temperatures exceed 60 degrees. As with the slightly larger Drunella coloradensis, this species prefers cold tailwaters, high elevation headwaters and spring creeks.

Drunella spinifera (Western Slate Olive Dun) Western Slate Olive Dun Nymph

Drunella spinifera (Western Slate Olive Dun) Mayfly Nymph

View 3 PicturesThis species resembles Drunella grandis but the spines tell the story.

Collected December 19, 2009 from in
Added to Troutnut.com by on June 26, 2011

Female Drunella spinifera (Western Slate Olive Dun) Western Slate Olive Dun Dun

Female Drunella spinifera (Western Slate Olive Dun) Mayfly Dun

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Collected July 9, 2007 from in
Added to Troutnut.com by on June 29, 2011

Male Drunella spinifera (Western Slate Olive Dun) Western Slate Olive Dun Spinner

Male Drunella spinifera (Western Slate Olive Dun) Mayfly Spinner

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Collected July 9, 2007 from in
Added to Troutnut.com by on June 29, 2011