Blue-winged Olives
Baetis
Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Featured on the forum
Nymphs of this species were fairly common in late-winter kick net samples from the upper Yakima River. Although I could not find a key to species of Zapada nymphs, a revision of the Nemouridae family by Baumann (1975) includes the following helpful sentence: "2 cervical gills on each side of midline, 1 arising inside and 1 outside of lateral cervical sclerites, usually single and elongate, sometimes constricted but with 3 or 4 branches arising beyond gill base in Zapada cinctipes." This specimen clearly has the branches and is within the range of that species.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and
fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or
support the project for an enhanced experience here.
Caddisfly Genus Neophylax (Autumn Mottled Sedges)
In his tables in Caddisflies, Gary LaFontaine ranks this as the fourth most important genus in the Pacific Northwest, where the main species are Neophylax rickeri and Neophylax splendens, but other species may be important across the country. Swisher and Richards in Selective Trout say that Neophylax fuscus is very important in the Midwest.
Where & when
Neophylax caddisflies emerge in concentrated numbers in the fall because they enter diapause during the summer, which synchronizes their emergence to within three weeks on a given stretch of stream.In 150 records from GBIF, adults of this genus have mostly been collected during October (43%), September (27%), June (8%), July (7%), August (7%), and November (5%).
In 123 records from GBIF, this genus has been collected at elevations ranging from 30 to 8566 ft, with an average (median) of 1601 ft.
Genus Range
Egg-Laying behavior
The ovipositing behavior of this genus is not well-documented, but what is known varies by species.Specimens of the Caddisfly Genus Neophylax
1 Female Adult
This large caddisfly looks really neat close-up.
3 Larvae
The size of the head compared to the body in this larva is surprising, and I think this means it's a fairly early instar of something which is going to get a lot bigger, but I'm not sure.
See the forum comments for notes on the identification of this specimen.
2 Underwater Pictures of Neophylax Caddisflies:
A variety of cased caddisfly larvae, probably mostly Neophylax, have clustered along the backside of a rock in fast water. There seem to be some Helicopsychidae larvae clustered along the bottom, and a few other taxa are mixed in. It's interesting that several larvae have especially large stones placed over the front openings of their cases, perhaps to block the case off for pupation.
It does seem to be the wrong time of year for Neophylax to be pupating, but that was the ID given for one of these which I collected and photographed up close.
It does seem to be the wrong time of year for Neophylax to be pupating, but that was the ID given for one of these which I collected and photographed up close.
A wide variety of caddis larvae and other insects have clustered together on the backside of this rock in fast water.
In this picture: Caddisfly Genus Neophylax (Autumn Mottled Sedge).
Start a Discussion of Neophylax
References
- Baumann, Richard W. 1975. Revision of the Stonefly Family Nemouridae (plecoptera) : a Study Of The World Fauna At The Generic Level. Smithsonian Contributions to Zoology undef(211): 1-74.
- LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
- Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.
Caddisfly Genus Neophylax (Autumn Mottled Sedges)
Taxonomy
Species in Neophylax
Neophylax concinnus
0
0
Neophylax fuscusSmall Dot-Wing Sedges
0
0
Neophylax rickeriBrown Dot Sedges
0
0
Neophylax splendens
0
0
21 species (Neophylax acutus, Neophylax aniqua, Neophylax atlanta, Neophylax auris, Neophylax ayanus, Neophylax consimilis, Neophylax delicatus, Neophylax etnieri, Neophylax mitchelli, Neophylax nacatus, Neophylax occidentis, Neophylax oligius, Neophylax ornatus, Neophylax ottawa, Neophylax securis, Neophylax sinuatus, Neophylax slossonae, Neophylax smithi, Neophylax stolus, Neophylax toshioi, and Neophylax wigginsi) aren't included.