The Kuparuk is known and written up in the guides as a good grayling fishery, but this is the only one I caught when I fished half a mile up from the road. Grayling can be fairly migratory, and perhaps they were already elsewhere preparing for winter when I fished.
Troutnut.com is a collection of pictures and information about fly fishing. Fly fishermen, fly tiers, and trout enthusiasts of all stripes can learn more about life beneath the surface of trout streams, as well as how to better imitate aquatic insects with artificial flies to catch trout. There are aquatic insect pictures, underwater pictures, landscape pictures, and a comprehensive reference to the common names of trout stream insects.