I agree with all of the above posts, but in my experience, trout feeding on minnows prefer a well-presented Black Ghost above all else. Any serious streamer fishermen should carry this fly in sizes 6-14. The classic style with a hackle tip is hard to tie and the right material often eludes me. If you choose to tie your own, consider using maribou, bucktail or zonker strips in place of the feather wing.

The article entitled "Young-of-the-Year Streamers" by Art Lee in his book "Lore of Trout Fishing" says it all. He describes various scenarios where big trout (mainly browns) feed on young-of-year minnows, often in shallow water. His favorite imitative fly for baby minnows is the venerable Black Ghost.

Good luck, please let us know of your success!