It's amazing how one fly can catch so much. I admit that most of the flies I have, only four boxes full, will probably never be seen by a fish. Those few that are known to work, get the fish. They get tied on first and that's as far as it needs to go most of the time. If I do change flies, it's usually to a smaller one more often than a different pattern.
Pan fish are a ball with flies. Heck, I can remember walking along the face of a rock dam highway crossing at San Luis Res. and just knocking the big pan fish dead. All I did was jig a fly in the gaps between the big boulders and the fight was on. They apparently would hide in the rocks to avoid the Stripers that try to get them. E