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Insect Order Ephemeroptera (Mayflies)



Pictures Below ↓

This is page 82 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...81828384
Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly NymphEphemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Nymph View 3 PicturesThis is a really really really really tiny mayfly nymph. It has gills on abdominal segments 3-7 in the characteristic orientation for the Ephemerellidae family, and it has no fain tail as best I can tell, just uniform tail coverage with small black hairs of equal length. I think this one's too young to identify.
Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006
Male Ameletus vernalis (Brown Dun) Mayfly DunMale Ameletus vernalis (Brown Dun) Mayfly Dun View 1 Pictures
Collected April 25, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on April 26, 2012
Male Tricorythodes (Tricos) Mayfly SpinnerMale Tricorythodes (Tricos) Mayfly Spinner View 3 Pictures
Collected August 11, 2018 from the Big Hole River in Montana
Added to Troutnut.com by Troutnut on June 11, 2019
Drunella coloradensis (Small Western Green Drake) Mayfly NymphDrunella coloradensis (Small Western Green Drake) Mayfly Nymph View 1 Pictures
Collected August 9, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on August 9, 2011
Ameletus (Brown Duns) Mayfly NymphAmeletus (Brown Duns) Mayfly Nymph View 2 PicturesThese two exuviae are my sad little consolation prize after collecting a couple of really cool, large, mature mayfly nymphs I didn't recognize from a tiny, probably fishless, spring-fed tributary of a slightly less tiny trout stream. I saw the nymphs in the kicknet samples and carefully transferred each one to my holding cooler before going to collect more samples. When I got home, I carefully went through the whole sample and couldn't find either one of them. Getting worried, I did it again and even more carefully. This time, I found both exuviae. By process of elimination, pretty much the only possibility is that both of them hatched out of my cooler and flew away during the 10 minutes or so that I had the lid off to collect more samples.

I was really excited about them for the whole three-hour drive home and seriously bummed that they disappeared. In the field I thought they might be one of the families of swimmer nymphs I don't have yet, like Ametropodidae, but keying the exuviae takes me to Ameletus, so at least I didn't miss some great rarity. Still, they were much larger and darker than any other Ameletus I've collected and probably a species I don't have yet.
Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019
Female Callibaetis (Speckled Spinners) Mayfly DunFemale Callibaetis (Speckled Spinners) Mayfly Dun View 1 Pictures
Collected May 25, 2005 from Flathead Lake in Montana
Added to Troutnut.com by Bnewell on July 14, 2011
Female Ephemerella excrucians (Pale Morning Dun) Mayfly DunFemale Ephemerella excrucians (Pale Morning Dun) Mayfly Dun View 5 Pictures
Collected July 31, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 17, 2020
Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly DunFemale Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun View 2 PicturesI've tentatively called this fragile, highly damaged dun a Serratella species. I had much better pictures of the species but lost them. It's about size 22, but good-sized trout were rising to this hatch; I suspect it has to do with the solid profile shown by the dark, almost-black wings that have given this hatch the name "Darth Vaders" among some Wisconsin anglers.
Collected July 14, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Male Ameletus vernalis (Brown Dun) Mayfly SpinnerMale Ameletus vernalis (Brown Dun) Mayfly Spinner View 1 Pictures
Collected April 25, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on April 26, 2012
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 1 Pictures
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Specimen Page:1...81828384
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