Blog & Latest Updates
Fly Fishing Articles
Insects by Common Name

Trout Streams & Rivers
Trout Pictures
Underwater Pictures

Desktop Backgrounds
Stream & Bug Videos
Image Use Pricing

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	0	0
BaetidaeBlue-Winged Olives	0	10
BaetiscidaeArmored Mayflies	0	1
CaenidaeAngler's Curses	0	0
EphemerellidaeHendricksons, Sulphurs, PMDs, BWOs	0	37
EphemeridaeHexes and Big Drakes	0	3
HeptageniidaeMarch Browns, Cahills, Quill Gordons	0	11
IsonychiidaeSlate Drakes	0	0
LeptohyphidaeTricos	0	1
LeptophlebiidaeBlue Quills and Mahogany Duns	0	0
MetretopodidaePseudo-Gray Drakes	0	0
Neoephemeridae	0	0
PolymitarcyidaeWhite Flies	0	0
PotamanthidaeGolden Drakes	0	0
SiphlonuridaeGray Drakes	0	3

8 families aren't included.

Common Name

Match	Common Name
	Mayflies

Pictures Below ↓

This is page 51 of specimens of Ephemeroptera. Visit the main Ephemeroptera page for:

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

Pictures of 828 Mayfly Specimens:

Specimen Page:1...505152...84

Male Hexagenia limbata (Hex) Mayfly Spinner

View 1 Pictures

Collected July 11, 2009 from Flathead Lake in Montana
Added to Troutnut.com by Bnewell on June 27, 2011

Caenis (Angler's Curses) Mayfly Dun

View 1 Pictures

Collected August 5, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006

Female Penelomax septentrionalis Mayfly Dun

View 10 PicturesI'm confident this dun belongs to septentrionalis, because her legs are just too long for any other Ephemerellid, and her unusual mid-dorsal (Dorsal: Top.) stripe matches those of two easily identified nymphs I collected some miles downstream.

This really pretty mayfly was in kind of bad shape when I found it crippled on the surface, and bouncing around in my container with a bunch of green drakes didn't help.

Collected June 1, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 4, 2007

Drunella doddsii (Western Green Drake) Mayfly Nymph

View 7 Pictures

Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020

Metretopus (Pseudo-Gray Drakes) Mayfly Nymph

View 1 Pictures

Collected July 15, 2009 from the Mulchatna River in Alaska
Added to Troutnut.com by Bnewell on June 27, 2011

Caudatella edmundsi Mayfly Nymph

View 1 PicturesThis species was previously know only from the nymph. I reared nymphs and we described the adults and eggs of this interesting species.

Collected July 20, 2010 from the Vermillion River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011

Rhithrogena Mayfly Nymph

View 1 PicturesNote the unusual red coloration of these Rhithrogena nymphs.

Collected July 17, 2008 from Rock Creek in Montana
Added to Troutnut.com by Bnewell on June 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

Female Acentrella turbida (Tiny 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

Ecdyonurus criddlei (Little Slate-Winged Dun) Mayfly Nymph

View 1 PicturesThis is an interesting Heptageniid mayfly since in western Montana it is only found in cold lakes, especially those in Glacier National Park.

Collected July 31, 2007 from Kintla Lake in Montana
Added to Troutnut.com by Bnewell on June 26, 2011

Specimen Page:1...505152...84

Jargon Defined:

Dorsal: Top.

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.

Nymphs: 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.