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.
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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.
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Report at a Glance
| General Region | Catskills |
| Specific Location | West Branch of Delaware and Beaver Kill |
| Dates Fished | 5/31/05 |
| Time of Day | 9 AM - 1 PM |
| Fish Caught | 4 Brown Trout: 3 were ~ 10 inches, one ~ 17 inches |
| Conditions & Hatches | A few large brown mayflies, and some "giant" looking stoneflies. |
Details and Discussion
Willy on Jun 1, 2006June 1st, 2006, 6:08 am EDT
Caught 2 fish on the West Branch on CDC and Elk in about a size 10 or 12. Both were the village idiots, for their jaws were ripped to shreds.
On the Beaverkill, drifted nymphs through fast water. Got one small brown, then broke off a very large fish on a big stonefly nymph. Then caught and landed a 17 inch brown on a stonefly nymph. His mouth was beat up too, and it had someone else's fly in it.
Not much insect activity, it was about 85 degrees and sunny. Some caddis on the West Branch and some big mayflies and stoneflies on the Beaver Kill.
On the Beaverkill, drifted nymphs through fast water. Got one small brown, then broke off a very large fish on a big stonefly nymph. Then caught and landed a 17 inch brown on a stonefly nymph. His mouth was beat up too, and it had someone else's fly in it.
Not much insect activity, it was about 85 degrees and sunny. Some caddis on the West Branch and some big mayflies and stoneflies on the Beaver Kill.
Check out my fishing pictures on Instagram.
Njflytyer on Jun 19, 2007June 19th, 2007, 12:26 pm EDT
Willy, Thanks for shareing, and cograts on your catch. G;ad to see how it's done.Also enjoyed the picture. Tight Lines, Chris
Martinlf on Jun 19, 2007June 19th, 2007, 2:25 pm EDT
Fat pretty fish. Nice work.
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell
--Fred Chappell
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