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Mayfly Family Heptageniidae (March Browns, Cahills, Quill Gordons)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Heptageniidae (March Browns, Cahills, Quill Gordons)

Genus in Heptageniidae
CinygmaWestern Light Cahills	0	0
CinygmulaDark Red Quills	0	0
EcdyonurusWestern Ginger Quills	0	0
EpeorusLittle Maryatts	0	9
Heptagenia	0	0
Ironodes	0	0
Leucrocuta	0	0
MaccaffertiumMarch Browns and Cahills	0	1
Nixe	0	0
Rhithrogena	0	0
StenacronLight Cahills	0	0
Stenonema	0	0

4 genera aren't included.

Common Name

Match	Common Name
	March Browns, Cahills, Quill Gordons

Pictures Below ↓

This is page 8 of specimens of Heptageniidae. Visit the main Heptageniidae page for:

The behavior and habitat of Heptageniidae.
11 underwater pictures of Heptageniidae.

Pictures of 215 Mayfly Specimens in the Family Heptageniidae:

Specimen Page:1...789...23

Female Epeorus frisoni Mayfly Dun

View 7 PicturesI collected this female dun together with a female spinner, a male dun, and a larger, damaged male dun.

Collected September 6, 2006 from Mystery Creek #23 in New York
Added to Troutnut.com by Troutnut on October 3, 2006

Maccaffertium vicarium (March Brown) Mayfly Nymph

View 3 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Epeorus (Little Maryatts) Mayfly Dun

View 5 PicturesI'm guessing this female is of the same species as this male dun, because they came from the same pool at the same time and the size matches, although the males and females would look very different in this case.

Collected July 5, 2017 from the South Fork Sauk River in Washington
Added to Troutnut.com by Troutnut on July 6, 2017

Epeorus vitreus (Sulphur) Mayfly Nymph

View 3 PicturesKey features I discerned with a microscope include that the femoral flange is sharp, and the first gill is not extended.

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Leucrocuta hebe (Little Yellow Quill) Mayfly Nymph

View 4 Pictures

Collected June 9, 2005 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006

Female Stenacron interpunctatum (Light Cahill) Mayfly Dun

View 6 PicturesThis is a fairly small late-season female Stenacron dun.

Collected August 22, 2006 from the West Branch of Owego Creek in New York
Added to Troutnut.com by Troutnut on August 23, 2006

Maccaffertium mediopunctatum (Cream Cahill) Mayfly Nymph

View 4 Pictures

Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006

Male Maccaffertium vicarium (March Brown) Mayfly Spinner

View 5 PicturesThis spinner comes from a dun I collected and photographed earlier.

Collected May 28, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006

Maccaffertium vicarium (March Brown) Mayfly Nymph

View 3 Pictures

Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Maccaffertium vicarium (March Brown) Mayfly Nymph

View 3 Pictures

Collected March 1, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:1...789...23

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.

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.

Useful References:

Arbona, Fred Jr. 1989. Mayflies, the Angler, and the Trout. Nick Lyons Books.