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Insect Order Ephemeroptera (Mayflies)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

Family in Ephemeroptera
AmeletidaeBrown Duns	9	38
BaetidaeBlue-Winged Olives	75	307
BaetiscidaeArmored Mayflies	25	128
CaenidaeAngler's Curses	11	30
EphemerellidaeHendricksons, Sulphurs, PMDs, BWOs	206	921
EphemeridaeHexes and Big Drakes	52	292
HeptageniidaeMarch Browns, Cahills, Quill Gordons	165	794
IsonychiidaeSlate Drakes	20	105
LeptohyphidaeTricos	6	31
LeptophlebiidaeBlue Quills & Mahogany Duns	55	232
MetretopodidaePseudo-Gray Drakes	11	39
Neoephemeridae	1	7
PolymitarcyidaeWhite Flies	0	1
PotamanthidaeGolden Drakes	0	0
SiphlonuridaeGray Drakes	15	55

8 families aren't included.

Common Name

Match	Common Name
	Mayflies

Pictures Below ↓

This is page 53 of specimens of Ephemeroptera. Visit the main Ephemeroptera page for:

The behavior and habitat of Ephemeroptera.
67 underwater pictures of Ephemeroptera.
35 streamside pictures of Ephemeroptera.

Pictures of 657 Mayfly Specimens:

Specimen Page:1...525354...67

Ephemerella dorothea infrequens (Pale Morning Dun) Mayfly Nymph

View 2 PicturesThis mature nymph is associated with the dun from the same location and date range posted on this hatch page. Size 10mm.

Collected November 12, 2011 from the Fall River in California
Added to Troutnut.com by Entoman on December 15, 2011

Female Acentrella turbida (Miniature Blue-Winged Olive) Mayfly Spinner

View 1 PicturesHere is the female spinner of the tiny Acentrella turbida. You can see the coloration is quite different from the male.

Collected July 27, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 29, 2011

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 PicturesThis little Baetid looks a little stiff because it died shortly before being photographed.

Collected February 5, 2004 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Epeorus longimanus (Slate Brown Dun) Mayfly Spinner

View 2 Pictures

Collected July 26, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 26, 2011

Female Epeorus longimanus (Slate Brown Dun) Mayfly Spinner

View 1 PicturesI associated this female with a male I collected one night later. For a great and informative discussion of all Epeorus species and other mayflies be sure and read, WESTERN MAYFLY HATCHES by R. Hafele and D. Hughes. They rate all of the western mayflies and they rate the hatch of this genus a 25 out of a possible 45 points based on several rating criterion. They provide insect photos, possible fly patterns and fly presentations. This is a great book.

Collected July 24, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 25, 2011

Epeorus (Little Maryatts) Mayfly Nymph

View 8 Pictures

Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011

Female Cinygmula (Dark Red Quills) Mayfly Dun

View 7 Pictures

Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 PicturesClose examination under a microscope revealed that this Baetid nymph has segment 5 pale, segments 8, 9, and 10 pale but less so, a middle tail almost as long as the outer tails, conspicuous gill veinlets (Veinlet: Short insect wing veins connecting the major longitudinal veins to the wing margin.), no bands on its tails, and pointed, slender 7th gills.

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

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 PicturesThis specimen has indistinct gill veinlets (Veinlet: Short insect wing veins connecting the major longitudinal veins to the wing margin.), a rounded seventh gill, and no bands on the tails.

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

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 2 Pictures

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

Specimen Page:1...525354...67

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.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

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.

Veinlets: Short insect wing veins connecting the major longitudinal veins to the wing margin.