Insects and other foods the trout may be eating:
1.   Blue-winged Olives
2.   Little Black Winter Stoneflies
3.   Streamers - matching sculpin, baitfish and small crayfish
4.   Midges

Basics of Fly Fishing - Trout Food Series - Minnows - Lesson 29
Minnows, or the Cyprinidae family of fish, consist of over 1500 species. Carp,
daces, shiners and chubs are minnows. Sculpin and Sticklebacks, which are small
fish, are not minnows. They will be covered separately.

I found the following information researching minnows interesting:
Colorado Squawfish, is the largest minnow in North America, and can grow up to
five feet long. Most minnows are only a few inches long at the most. Carp, which
happens to be a group of fish fly fisherman pursue in many cases, are also
minnows that grow much larger than a few inches. All native species of minnows in
Tennessee are small, or less than 5 inches long. There are 27 species of minnows
that have been identified in Great Smoky Mountains National Park.

I am not sure just which species are most plentiful. I haven't really put any time into
studying that. Most likely the park fishery managers are very familiar with them. I do
know that minnows are a source of food for the trout but to what extent, I do not

Some of the flies that imitate minnows that have been around for years are the
Mickey Finn, Blacknose Dace, Gray Gost, etc.

Copyright 2009 James Marsh