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Animal Phylum Arthropoda (Arthropods)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

Class in Arthropoda
ArachnidaMites and Spiders	0	1
CollembolaSpringtails	0	0
Crustacea-MalacostracaCrayfish, Scuds, and Sowbugs	0	10
Crustacea-Maxillopoda	0	0
InsectaInsects	0	114

Common Name

Match	Common Name
	Arthropods

Pictures Below ↓

This is page 8 of specimens of Arthropoda. Visit the main Arthropoda page for:

The behavior and habitat of Arthropoda.
122 underwater pictures of Arthropoda.

Pictures of 1244 Arthropod Specimens:

Specimen Page:1...789...126

Male Epeorus albertae (Pink Lady) Mayfly Spinner

View 14 Pictures

Collected July 11, 2017 from the North Fork Stillaguamish River in Washington
Added to Troutnut.com by Troutnut on July 12, 2017

Leptophlebia cupida (Borcher Drake) Mayfly Nymph

View 8 Pictures

Collected March 29, 2005 from Fall Creek in New York
Added to Troutnut.com by Troutnut on April 6, 2006

Pteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph

View 7 Pictures

Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female 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

Agnetina capitata (Golden Stone) Stonefly Nymph

View 8 Pictures

Collected March 30, 2007 from Fall Creek in New York
Added to Troutnut.com by Troutnut on April 2, 2007

Male Epeorus (Little Maryatts) Mayfly Spinner

View 10 PicturesThis spinner and hundreds of others like it were dancing over the road through a very narrow valley carved by a tiny, steep tributary of the trout stream I was fishing. I got strange looks from a few passers-by, standing around on the road with a butterfly net...

Collected May 9, 2007 from Unnamed trib of Factory Brook along 42a in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Female 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 Epeorus (Little Maryatts) Mayfly Dun

View 12 PicturesI hoped this dun would molt into a spinner for a positive ID, but it didn't. My best guess is Epeorus dulciana, but that's only because that's the smallest western Epeorus species, and this specimen is smaller than any of the others, with a body length of 5.3 mm (although it would be longer as a spinner) and a wing length of 8.5 mm.

It was collected at the same time as a similar-sized female dun.

Collected July 5, 2017 from the South Fork Sauk River in Washington
Added to Troutnut.com by Troutnut on July 6, 2017

Male Siphlonurus quebecensis (Gray Drake) Mayfly Spinner

View 10 Pictures

Collected June 2, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006

Paragnetina (Golden Stones) Stonefly Adult

View 10 PicturesUnfortunately I forgot to photograph this one next to the ruler, but I seem to remember it being on the small side for a Perlid, maybe around 2cm.

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

Specimen Page:1...789...126

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.

Molt: When aquatic insects with hard exoskeletons (like mayfly and stonefly nymphs) grow bigger, their exoskeleton does not grow with them. Instead they grow a new, larger one underneath and shed the old one when it's too small. This process is called molting.

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.