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.

Stream photos

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Ephemerella mucronata Mayfly Nymph Ephemerella mucronata Mayfly Nymph

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.

17 Recently Added Photos

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.

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.

A bunch of new Alaska photos on a new site

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Mar 30, 2008March 30th, 2008, 8:28 am EDT

I've been taking a lot of pictures around Alaska that don't quite fit the streams & fishing theme of this site, but are worth showing around. So I've created a separate site as a photojournal for my Alaska travels.

Once I get a lot more pictures up (and I have a LOT from the summer and fall that aren't on there yet) I'll be linking this into the main blue menu on this site, along with a new fly tying contest site. But the look & feel of the Alaska one is pretty much done so I'm announcing it here on the forum.

The new site won't take away from this one at all. Instead it's a place for stuff that doesn't quite make sense on this one. In fact, some of the pictures will overlap.

North of the North - a glimpse of Alaska

Questions? Comments? Criticisms?

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

Lifeaquatic
new england

Posts: 4

Lifeaquatic on Mar 31, 2008March 31st, 2008, 9:10 am EDT

Man those northern lights shots are awesome. good work and thank you.

we seek for slumbering trout,and whispering in their ears,
give them unquiet dreams.