09-21-2009, 11:03 PM
That bug is a "mahogany dun." I won't look-up the latin because its meaningless. I saw mahoganys in swarms on two rivers I fished in Wyoming over the weekend. They are the largest "fall" mayfly, usually hatch in the mid-day and especially mid-afternoon, and they fall to the water as spinners just before dusk. (Perfect!) The Henry's Fork in Idaho is famous for them at this time of year, as are many other spring-creek and slower type waters. The Green in Wyoming has them good on cloudy afternoons during September and early October.
Any mafly imitation reasonably close usually works, and a rusty spinner at dusk is just deadly. I fished a #14 parachute Adams on a tough creek Saturday afternoon, and the normally-wary fish ate it up with a good drift. The spinner almost isn't fair, also in a #14, with a SKINNY body and cdc windgs.
Choose your fly size according to the water and the rise forms. One size bigger than the natural is always my choice, especially if naturals are all over the place.
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Any mafly imitation reasonably close usually works, and a rusty spinner at dusk is just deadly. I fished a #14 parachute Adams on a tough creek Saturday afternoon, and the normally-wary fish ate it up with a good drift. The spinner almost isn't fair, also in a #14, with a SKINNY body and cdc windgs.
Choose your fly size according to the water and the rise forms. One size bigger than the natural is always my choice, especially if naturals are all over the place.
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