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Arthropod Class Insecta (Insects)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

Order in Insecta
ColeopteraBeetles	0	1
DipteraTrue Flies	0	9
EphemeropteraMayflies	0	67
HemipteraTrue Bugs	0	7
HymenopteraAnts, Bees, and Wasps	0	0
LepidopteraMoths	0	0
MegalopteraHellgrammites, Dobsonflies, and Alderflies	0	0
Odonata-AnisopteraDragonflies	0	0
Odonata-ZygopteraDamselflies	0	0
OrthopteraGrasshoppers and Crickets	0	0
PlecopteraStoneflies	0	6
Psocodea	0	0
TrichopteraCaddisflies	0	55

1 order isn't included.

Common Name

Match	Common Name
	Insects

Pictures Below ↓

This is page 79 of specimens of Insecta. Visit the main Insecta page for:

The behavior and habitat of Insecta.
114 underwater pictures of Insecta.

Pictures of 1229 Insect Specimens:

Specimen Page:1...787980...124

Hesperoperla pacifica (Golden Stone) Stonefly Adult

View 14 PicturesI collected this specimen as a nymph and had it in line to be photographed, but it emerged inside my holding container before I got the chance. However, I was able to get some interesting photos of the very freshly-emerged adult that really demonstrate how strikingly colors can change within a few short hours after emergence. The before-and-after pictures are combined here under a single specimen since they portray the same individual at different times within the same stage.

Based on the identification of another specimen from the same date/site, I'm calling this Hesperoperla pacifica.

Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

Lepidostoma (Little Brown Sedges) Little Brown Sedge Larva

View 12 Pictures

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

Male Rhithrogena hageni (Western Black Quill) Mayfly Spinner

View 14 PicturesAlthough I could not find the preserved specimen to examine under my good new microscope, I'm tentatively calling it one Rhithrogena hageni, based on apparent similarity to this specimen, which I was able to positively ID.

The relative angle of the penes (Penes: The paired genital structures of most male insects, which vary widely in form and are one of the main characteristics used for species identification.) is a bit shallower in this specimen, but I photographed another specimen from the same collecting trip (and I think even the same swarm, although I don't recall for sure) as the other one, and it had the shallower angle seen on this specimen. I'm guessing it's just variation within the species.

Collected July 8, 2019 from the Ruby River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

Rhyacophila (Green Sedges) Caddisfly Larva

View 11 Pictures

Collected June 13, 2019 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on June 14, 2019

Chironomidae (Midges) Midge Adult

View 7 PicturesOne of the only real benefits I've got from my rearing aquarium so far is that I've had quite a variety of midges emerge, giving me a chance to photograph these fragile little insects which are otherwise really hard to transport in photogenic form. This one recovered from being gassed and flew away before I could photograph it on the ruler, but it was very small, around 1.5mm.

Collected April 23, 2007 from Mystery Creek #62 in New York
Added to Troutnut.com by Troutnut on April 25, 2007

Female Ephemerella tibialis (Little Western Dark Hendrickson) Mayfly Dun

View 6 PicturesI'm fairly confident calling this dun Ephemerella tibialis because it emerged from one of several similar nymphs in my bucket, which I was able to ID with quite a bit of certainty. However, it looks very different from the other duns I currently have listed, which makes me rethink their IDs.

Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020

Brachycentrus americanus (American Grannom) Caddisfly Larva

View 18 PicturesThis species of Brachycentrus was extremely common in mid-September kick net samples in the Yakima canyon.

Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020

Male Eurylophella (Chocolate Duns) Mayfly Spinner

View 12 Pictures

Collected June 4, 2005 from the Teal River in Wisconsin
Added to Troutnut.com by Troutnut on May 24, 2006

Female Siphlonurus alternatus (Gray Drake) Mayfly Spinner

View 7 PicturesI'm tentatively classifying this one as Siphlonurus alternatus, because it seems to fit that species best in the old keys in Needham's Biology of Mayflies, but I'm hesitant because I can't find documentation that southwest Montana or the surrounding area is within the species' range, although they are widely distributed throughout eastern North American and western Canada.

Collected July 2, 2019 from the Gallatin River in Montana
Added to Troutnut.com by Troutnut on July 18, 2019

Chironomidae (Midges) Midge Larva

View 3 Pictures

Collected March 29, 2005 from Salmon Creek in New York
Added to Troutnut.com by Troutnut on April 7, 2006

Specimen Page:1...787980...124

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.

Emergence: The transformation of a nymph or pupa into the adult winged stage of an insect. The term may refer to the emergence of an individual, or the daily or yearly event in which all individuals of a species emerge.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

Penes: The paired genital structures of most male insects, which vary widely in form and are one of the main characteristics used for species identification.