**Mayfly Species Centroptilum album (Tiny Sulphur Dun)**

Mayflies

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

» Genus Centroptilum (Tiny Sulphur Duns)

» Species album (Tiny Sulphur Dun)

Common Names

Match	Common Name
	Tiny Sulphur Dun
	Blue-Winged Olive
	Pale Watery Dun
	Pale White-Winged Watery Dun
	Pale Gray-Winged Sulphur Dun
	Jenny Spinner
	Gray-Winged Olive Quill

Pictures Below ↓

This is the most commonly mentioned species of Centroptilum in angling books, but very little detail is ever given about its hatches. It has been reported to inhabit warm water, but information regarding cold water habitat is sketchy.

Where & When

Regions: East, Midwest, West

Time Of Year (?): June to October

Preferred Waters: Streams and lakes

Nymph Biology

Current Speed: Slow to moderate

Environmental Tolerance: Prefers warm water

Pictures of 2 Mayfly Specimens in the Species Centroptilum album:

Female Centroptilum album (Tiny Sulphur Dun) Mayfly Dun

View 8 PicturesThis dun of a fairly large Baetidae species was one of only a couple I saw all evening.

Collected August 24, 2006 from Enfield Creek in New York
Added to Troutnut.com by Troutnut on August 27, 2006

Female Centroptilum album (Tiny Sulphur Dun) Mayfly Dun

View 3 PicturesApprox. 5 mm. This is a very significant hatch. It is mostly seen at the height of Summer and I was very surprised to see it emerging this late in the season and in such numbers. When this one is emerging, the fish can become quite selective.

Collected November 9, 2011 from the Fall River in California
Added to Troutnut.com by Entoman on December 10, 2011

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Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Useful References:

Caucci, Al and Nastasi, Bob. 2004. Hatches II. The Lyons Press.

Knopp, Malcolm and Robert Cormier. 1997. Mayflies: An Angler's Study of Trout Water Ephemeroptera . The Lyons Press.

Leonard, Justin W. and Fannie A. Leonard. 1962. Mayflies of Michigan Trout Streams. Cranbrook Institute of Science.