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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.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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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Rhyacophila (Green Sedge) Caddisfly Pupa Pictures

This was a neat, rare view into a Rhyacophila caddisfly just beginning to pupate, with the features of the larva still clearly visible inside.

Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Pupa from Mystery Creek #199 in Washington
Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Pupa from Mystery Creek #199 in Washington
Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Pupa from Mystery Creek #199 in Washington

This caddisfly was collected from Mystery Creek #199 in Washington on July 28th, 2019 and added to Troutnut.com by Troutnut on July 30th, 2019.

Discussions of this Pupa

Cool Photo
Posted by Martinlf on Aug 5, 2019
Last reply on Aug 5, 2019 by Martinlf
I've never seen anything like this. Wow!

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References

Rhyacophila (Green Sedge) Caddisfly Pupa Pictures

Collection details
Location: Mystery Creek #199, Washington
Date: July 28th, 2019
Added to site: July 30th, 2019
Author: Troutnut
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