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.

Looking across Island Lake toward the Titcomb Basin—one of the popular crown jewels of the Wind River Mountains

From Island Lake in Wyoming

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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A few bugs from the Kinderhook Creek (NY)

Agresens has attached these 2 pictures to aid in identification. The message is below.

Agresens
Kinderhook, NY

Posts: 3

Agresens on Jun 17, 2018June 17th, 2018, 11:57 pm EDT

Two images - please help identify.

The NYMPH appears to be a Hendrickson?

The DUN was quite large. Seems like it had just hatched with malformed wings. A Drake?

Thanks

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 18, 2018June 18th, 2018, 5:45 pm EDT

Hi August-

I believe (what you refer to as the dun) is actually a male imago of genus Isonychia

I also believe (what you refer to as a Hendrickson), which is a common name often used for Eastern Ephemerella, is probably of genus Drunella.

The next time you photograph a mayfly nymph, I suggest using a pickle jar lid, and filling it with enough water to completely cover the nymph. That way, the body appendages will stand out, as opposed to being all stuck together.