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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 113 of specimens of Arthropoda. Visit the main Arthropoda page for:

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

Pictures of 1243 Arthropod Specimens:

Specimen Page:1...112113114...125

Taenionema pacificum (Willowfly) Stonefly Adult

View 2 Pictures

Collected March 12, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Male Lepidostoma podagrum (Little Brown Sedge) Little Brown Sedge Adult

View 3 Pictures

Collected May 12, 2011 from the Fall River in California
Added to Troutnut.com by Entoman on December 10, 2011

Female Zapada columbiana (Tiny Winter Black) Stonefly Adult

View 2 Pictures

Collected March 26, 2012 from the N. Fk Touchet River in Washington
Added to Troutnut.com by Bnewell on March 26, 2012

Neoleptophlebia Mayfly Nymph

View 6 Pictures

Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on July 3, 2018

Male 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

Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner

View 6 PicturesThis specimen was easy to key to species using the old keys in < id="115" />, and was the basis for IDs of several other Siphlonurus specimens of the same species collected on the same day.

Collected July 31, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 16, 2020

Claassenia sabulosa (Golden Stone) Stonefly Nymph

View 2 PicturesThis is a stonefly that has recently molted and has not yet darkened.

Collected May 14, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Male Cinygmula mimus Mayfly Spinner

View 2 PicturesMale Cinygmula mimus spinner trapped in its subimago (Subimago: Mayfly nymphs emerge from the water into subimagoes, better known to anglers as "duns." They are a sexually immature, winged, recognizably adult stage and they must molt one more time into imagoes or "spinners" before they can mate.) skin, a cripple (Cripple: In fly fishing, a cripple is any insect which has been injured or deformed so that it cannot escape the water. This may include stillborn emergers or fully emerged adults which have been damaged, often by wind or waves, so that they can no longer fly. Trout often favor eating crippled insects.)??

Collected June 3, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 5, 2012

Female Tricorythodes (Tricos) Mayfly Spinner

View 5 Pictures

Collected August 11, 2018 from the Big Hole River in Montana
Added to Troutnut.com by Troutnut on June 11, 2019

Male Drunella coloradensis (Small Western Green Drake) Mayfly Spinner

View 9 PicturesThis spinner molted from this dun, or possibly one other dun I had in the same container that looked just like it.

Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019

Specimen Page:1...112113114...125

Jargon Defined:

Cripple: In fly fishing, a cripple is any insect which has been injured or deformed so that it cannot escape the water. This may include stillborn emergers or fully emerged adults which have been damaged, often by wind or waves, so that they can no longer fly. Trout often favor eating crippled insects.

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.

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.

Subimago: Mayfly nymphs emerge from the water into subimagoes, better known to anglers as "duns." They are a sexually immature, winged, recognizably adult stage and they must molt one more time into imagoes or "spinners" before they can mate.