Just about the easiest fly you'll ever tie and damn effective!

Hook: any light wire
Thread: 6/0 any colour
Hair: Deer, any colour, blends are fun

If you know how to spin deer hair, get to it! Don't even worry about a body, fish don't care so much and it makes this a fly you won't mind trying to cast under those overhanging branches and cut banks and likely loosing a dozen or more of in a day.