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Mayfly Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)

Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
Genus in EphemerellidaeNumber of SpecimensNumber of Pictures
Attenella528
Caudatella00
Dannella00
DrunellaBlue-Winged Olives860
EphemerellaHendricksons, Sulphurs, PMDs122556
EurylophellaChocolate Duns1564
Serratella16
Timpanoga00

2 genera aren't included.
Common Name
Pictures Below

This is page 2 of specimens of Ephemerellidae. Visit the main Ephemerellidae page for:

  • The behavior and habitat of Ephemerellidae.
  • 37 underwater pictures of Ephemerellidae.
  • 9 streamside pictures of Ephemerellidae.

166 Mayfly Specimens in the Family Ephemerellidae:

Specimen Page:1234...18
Ephemerella invaria (Sulphur) Mayfly SpinnerEphemerella invaria (Sulphur) Mayfly SpinnerView 12 Pictures
Region: Upper Midwest
Collected Jun 3, 2005
Added May 25, 2006
Ephemerella subvaria (Hendrickson) Mayfly SpinnerEphemerella subvaria (Hendrickson) Mayfly SpinnerView 11 PicturesI collected this beautiful male Hendrickson specimen as a dun, along with a female Hendrickson from the same hatch. Both molted into spinners in my house within a couple of days.
Region: Northeast
Collected Apr 23, 2007
Added Apr 25, 2007
Ephemerella needhami (Little Dark Hendrickson) Mayfly SpinnerEphemerella needhami (Little Dark Hendrickson) Mayfly SpinnerView 12 Pictures
Region: Upper Midwest
Collected Jun 4, 2005
Added May 25, 2006
Ephemerella subvaria (Hendrickson) Mayfly DunEphemerella subvaria (Hendrickson) Mayfly DunView 9 PicturesI collected this female Hendrickson dun and a male in the pool on the Beaverkill where the popular Hendrickson pattern was first created. She is descended from mayfly royalty.
Region: Catskills
Collected Apr 19, 2006
Added Apr 22, 2006
Ephemerella septentrionalis Mayfly NymphEphemerella septentrionalis  Mayfly NymphView 12 PicturesThis is surely the most distinctive-looking species of Ephemerella nymph. I like the rugged, spindly look. If mayflies made movies, Ephemerella septentrionalis would probably play the supervillain.

Maybe I should take a break and get something to eat.
Region: Catskills
Collected May 13, 2007
Added May 18, 2007
Ephemerella needhami (Little Dark Hendrickson) Mayfly DunEphemerella needhami (Little Dark Hendrickson) Mayfly DunView 7 PicturesSee the comments for an interesting discussion of the identification of this dun.
Region: Catskills
Collected Jun 1, 2007
Added Jun 4, 2007
Drunella lata (Large Blue-Winged Olive) Mayfly NymphDrunella lata (Large Blue-Winged Olive) Mayfly NymphView 7 Pictures
Region: Upper Midwest
Collected Jun 5, 2005
Added May 25, 2006
Ephemerella septentrionalis Mayfly DunEphemerella septentrionalis  Mayfly DunView 10 PicturesI'm pretty sure this dun belongs to septentrionalis, because her legs are just too long for invaria. I know that species is in this system because I collected several nymphs 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.
Region: Catskills
Collected Jun 1, 2007
Added Jun 4, 2007
Ephemerella invaria (Sulphur) Mayfly SpinnerEphemerella invaria (Sulphur) Mayfly SpinnerView 12 Pictures
Region: Upper Midwest
Collected Jun 3, 2005
Added May 25, 2006
Eurylophella temporalis (Chocolate Dun) Mayfly NymphEurylophella temporalis (Chocolate Dun) Mayfly NymphView 9 Pictures
Region: Upper Midwest
Collected Jun 5, 2005
Added May 25, 2006
Specimen Page:1234...18
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Last update July 19th, 2007.
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