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Insect Order Ephemeroptera (Mayflies)



Pictures Below ↓

This is page 76 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...757677...84
Female Baetis tricaudatus (Blue-Winged Olive) Mayfly DunFemale Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun View 6 PicturesThis one emerged from a nymph of this kind in my studio but got a bit waterlogged before I could pull it out to photograph.
Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Male Cinygmula par Mayfly SpinnerMale Cinygmula par Mayfly Spinner View 9 PicturesThis spinner came from one of those huge swarms that make one just stop fishing and admire the spectacle. Not bad for a little-known species.

In the same swarm I collected a female and another male.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly SpinnerFemale Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Spinner View 6 Pictures
Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020
Female Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly SpinnerFemale Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner View 3 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 3 PicturesEvery picture of this Maccaffertium nymph was taken with my old C740UZ through a microscope.
Collected November 15, 2004 from Fall Creek in New York
Added to Troutnut.com by Troutnut on April 12, 2006
Male Rhithrogena robusta Mayfly SpinnerMale Rhithrogena robusta Mayfly Spinner View 3 PicturesThese specimens were collected from a mating swarm from the east branch of the North Fork of the Touchet River, upstream from the Bluewood Ski Area turn.It was a sunny warm day, mating swarm as 4-8 ft. above this small stream. Four male spinners were collected.Stream photos were taken.
Collected July 15, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 15, 2011
Male Tricorythodes (Tricos) Mayfly SpinnerMale Tricorythodes (Tricos) Mayfly Spinner View 3 PicturesI collected these males about 9:30 AM, air temp. about 68 degrees F. The males were flying about 3 ft above the stream flying up and down the stream rather than the typical vertical swarm you see with most mayfly males. The males are black and the females are a green color due to the eggs they are carrying. They do not live very long which is typical for small bodied mayflies. They do not fly during windy conditions. I suspect these are Tricorythodes minutus.
Collected August 12, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on August 12, 2011
Epeorus deceptivus Mayfly NymphEpeorus deceptivus Mayfly Nymph View 4 PicturesIdentification notes from the microscope: Gills on segment 1 extend anteriorly below the body, but not all the way to touching; posterolateral spines minor; femora (
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
Femur: The main segment of an insect's leg close to the body, in between the tibia and the trochanter.) without fuscous macula.
Collected August 4, 2020 from Green Lake Outlet in Idaho
Added to Troutnut.com by Troutnut on August 20, 2020
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 2 Pictures
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly NymphEphemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph View 3 PicturesI confirmed with the microscope that this specimen has very small tubercles (
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.), strongly double-banded tibiae (
The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.
The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.
Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.), and a fan tail.
Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006
Specimen Page:1...757677...84
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