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Insect Order Ephemeroptera (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.
  • 35 streamside pictures of Ephemeroptera.

Pictures of 657 Mayfly Specimens:

Specimen Page:1234...67
Female Baetis (Blue-Winged Olives) Mayfly DunFemale Baetis (Blue-Winged Olives) Mayfly Dun View 7 PicturesThis little early-season dun molted into this spinner after I photographed her.
Collected April 19, 2006 from Mongaup Creek in New York
Added to Troutnut.com by Troutnut on April 21, 2006
Male Baetis (Blue-Winged Olives) Mayfly DunMale Baetis (Blue-Winged Olives) Mayfly Dun View 14 PicturesThis dun molted most of the way into a spinner (though the wings got stuck) the evening after I photographed it, so I took some more photos of the spinner.

I found a female nearby, probably of the same species.
Collected September 19, 2006 from Mystery Creek #43 in New York
Added to Troutnut.com by Troutnut on October 4, 2006
Female Baetis tricaudatus (Blue-Winged Olive) Mayfly DunFemale Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun View 7 PicturesThis female was associated with a male of the same species.
Collected April 3, 2007 from Owasco Inlet in New York
Added to Troutnut.com by Troutnut on April 3, 2007
Male Leptophlebia cupida (Black Quill) Mayfly DunMale Leptophlebia cupida (Black Quill) Mayfly Dun View 6 PicturesThis Leptophlebia cupida dun was extremely cooperative, and it molted into a spinner for me in front of the camera. Here I have a few dun pictures and one spinner picture, and I've put the entire molting sequence in an article.
Collected May 27, 2005 from the Teal River in Wisconsin
Added to Troutnut.com by Troutnut on May 16, 2006
Male Baetidae (Blue-Winged Olives) Mayfly NymphMale Baetidae (Blue-Winged Olives) Mayfly Nymph View 10 PicturesThis male nymph is probably in its final instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.). The wing pads (
The wing pads on this final instar Baetidae mayfly nymph are extremely dark.
The wing pads on this final instar Baetidae mayfly nymph are extremely dark.
Wing pad: A protrusion from the thorax of an insect nymph which holds the developing wings. Black wing pads usually indicate that the nymph is nearly ready to emerge into an adult.
)
are extremely black and the large turbinate (
This male Baetidae dun has slightly turbinate eyes.
This male Baetidae dun has slightly turbinate eyes.
Turbinate: Shaped like a top or elevated on a stalk; usually refers to the eyes of some adult male Baetidae mayflies which are wider near the tip than at the base.
)
eyes are very apparent inside the nymph's head.
Collected June 9, 2005 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Ephemerella dorothea dorothea (Pale Evening Dun) Mayfly NymphEphemerella dorothea dorothea (Pale Evening Dun) Mayfly Nymph View 6 PicturesI keyed this nymph carefully under a microscope to check that it's Ephemerella dorothea.
Collected May 29, 2007 from Paradise Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Female Centroptilum album (Tiny Sulphur Dun) Mayfly DunFemale Centroptilum album (Tiny Sulphur Dun) Mayfly Dun View 8 PicturesThis dun of a fairly large Baetidae species was one of only a couple I saw all evening.
Collected August 24, 2006 from Enfield Creek in New York
Added to Troutnut.com by Troutnut on August 27, 2006
Specimen Page:1234...67
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