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Animal Kingdom Animalia (Animals)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

Phylum in Animalia
AnnelidaWorms and Leeches	0	2
ArthropodaArthropods	0	122
ChordataVertebrates	0	4
Mollusca	0	6
PlatyhelminthesFlatworms	0	0

Common Name

Match	Common Name
	Animals

Pictures Below ↓

This is page 57 of specimens of Animalia. Visit the main Animalia page for:

The behavior and habitat of Animalia.
131 underwater pictures of Animalia.

Pictures of 1264 Animal Specimens:

Specimen Page:1...565758...128

Ephemerella subvaria (Hendrickson) Mayfly Nymph

View 3 PicturesThis is one of the nymphs I collected doing something very, very strange on March 17th 2004. In the middle of the day, around 2 pm, in the water right around my feet I watched lots of Ephemerella nymphs clumsily swimming up all the way to the surface and then just kind of drifting and wiggling around in the water column. None hatched. They seemed to do it more intensely when the sun was out. It wasn't the time of day for the normal invertebrate drift phenomenon, and as far as I know invertebrate drift doesn't involve this kind of clear effort to swim all the way to the surface. I didn't need a net to catch them, I just reached down into the water and grabbed them with my fingers just below the surface.

The prominent abdominal tubercles (

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.) aren't quite black, though, and the general color is a dark brown, though I saw nymphs with all Hendrickson color stages behaving strangely.

Collected March 17, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Limnophila True Fly Larva

View 2 Pictures

Collected February 2, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Isonychia bicolor (Mahogany Dun) Mayfly Nymph

View 2 Pictures

Collected February 10, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Perlidae (Golden Stones) Stonefly Nymph

View 2 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Perlidae (Golden Stones) Stonefly Nymph

View 2 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Corydalidae (Hellgrammites) Hellgrammite Larva

Corydalidae (Hellgrammites) Insect Larva

View 2 PicturesI believe this is a verr young hellgrammite that just hasn't darkened to its regular color yet, but I'm not sure.

Collected February 2, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Taeniopteryx (Early Black Stoneflies) Stonefly Nymph

View 2 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Taenionema pacificum (Willowfly) Stonefly Adult

View 2 Pictures

Collected March 1, 2005 from the Jocko River in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 Pictures

Collected February 5, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Siphlonurus occidentalis (Gray Drake) Mayfly Spinner

View 4 Pictures

Collected July 31, 2007 from Crazy Beaver Spring in Montana
Added to Troutnut.com by Bnewell on June 28, 2011

Specimen Page:1...565758...128

Jargon Defined:

Nymphs: 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).

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercles: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.