Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

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.

Sunlight perfectly strikes the trees at a bend in the Foss River in the Washington Cascades.

From the Foss River in Washington

Stream photos

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Epeorus albertae (Pink Lady) Mayfly Nymph Epeorus albertae (Pink Lady) Mayfly Nymph

Dorsal view of a Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington

This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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Stone fly from Spain

Isidro
Posts: 24

Isidro on May 4, 2008May 4th, 2008, 3:04 am EDT

Maybe stone flies will be more successful than the mayflies. I tried to find a key for European families of Plecoptera but I don't have found it. This one was photographed yesterday at Bádenas, Teruel, Aragon, NE Spain at 850 meters high, in a point of permanent quiet water very dirty and full of aquatic grasses and hedges (Typha, Scirpus etc), with lime soil and surrounded by cultivated fields. The stone fly sizes about 17 mm long (including wings, not including antennae), and have not cerci. I have the collected expemplar for see the venation or all these characters that you can need for helps me with the identification.

Here are a list of all Iberian Peninsula stoneflies.

http://www.fauna-iberica.mncn.csic.es/faunaib/arthropoda/insecta/plecoptera/index.php

And here is the bug.

Thanks in advance.
Isidro

Isidro
Posts: 24

Isidro on May 8, 2008May 8th, 2008, 11:52 am EDT

What a great success!!!

Well, looking in a book I see the venation very, very similar to Nemoura. I thinks that family Nemouridae is sure, then. But there are many, many (too many) species... so, it's impossible, only would be identified by distribution maybe...