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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	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 2 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:123 4...84

Male Neoleptophlebia adoptiva (Blue Quill) Mayfly Dun

View 14 Pictures

Collected April 30, 2007 from Dresserville Creek in New York
Added to Troutnut.com by Troutnut on May 3, 2007

Ephemera simulans (Brown Drake) Mayfly Nymph

View 10 Pictures

Collected January 31, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Ephemerella subvaria (Hendrickson) Mayfly Dun

View 9 PicturesI collected this male Hendrickson dun and a female in the pool on the Beaverkill where the popular Hendrickson pattern was first created. He is descended from mayfly royalty.

Collected April 19, 2006 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on April 22, 2006

Baetis (Blue-Winged Olives) Mayfly Nymph

View 10 Pictures

Collected May 6, 2007 from Mongaup Creek in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Ephemera simulans (Brown Drake) Mayfly Nymph

View 10 Pictures

Collected January 31, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Maccaffertium (March Browns and Cahills) Mayfly Adult

View 13 Pictures

Collected May 26, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 16, 2006

Female Drunella tuberculata Mayfly Dun

View 14 PicturesI don't know for sure that this is Drunella tuberculata, but that's my best guess for now.

It certainly has a different look and much more robust body shape from Drunella lata duns I photographed a couple weeks earlier, so I doubt it's that species. Using distribution records to eliminate other choices narrows this down to Drunella tuberculata or Drunella walkeri.

Markings described for the abdominal sternites (

One sternite of this Isonychia bicolor mayfly spinner is highlighted in red.

Sternite: The bottom (ventral) part of a single segment on an insect's abdomen.) of the male spinner of Drunella tuberculata are suspiciously similar to those on this female dun. Also, this dun is 9.5mm long (my ruler pic isn't very good, but I'm basing this on measuring the real thing). The size range given in the old Allen & Edmunds keys for walkeri females is 7-8mm, while tuberculata is 9-11mm. For these reasons I'm sticking it in tuberculata for now.

This is the only Drunella mayfly I saw all day. I scooped it off the water as it emerged at around 7pm from a big Catskill tailwater.

Collected June 1, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007

Penelomax septentrionalis Mayfly Nymph

View 12 PicturesThis is surely the most distinctive-looking species in Ephemerellidae. I like the rugged, spindly look. If mayflies made movies, Penelomax septentrionalis would probably play the supervillain.

Maybe I should take a break and get something to eat.

Collected May 13, 2007 from the Delaware River in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Male Ephemera guttulata (Green Drake) Mayfly Spinner

View 12 PicturesThis spinner was the only member of its species I saw all night during an incredibly thick and tricky mixed hatch on Penn's Creek a few days before the real start of its famous green drake hatch.

Collected May 26, 2007 from Penn's Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007

Female Isonychia bicolor (Mahogany Dun) Mayfly Dun

View 13 Pictures

Collected June 14, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006

Specimen Page:123 4...84

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.

One sternite of this Isonychia bicolor mayfly spinner is highlighted in red.

Sternites: The bottom (ventral) part of a single segment on an insect's abdomen.