The Adams fly is one which should be in all river angler fly boxes.
This fly was originally tied by Leonard Halladay and named after his good friend Charles Adams (from “The History of Fly Fishing in Fifty Flies”, by Ian Whitelaw (https://www.amazon.co.uk/History-Fly-Fishing-Fifty-Flies/dp/1781314012). Nobody is really sure exactly what his fly imitates, but it is one of the all-time greats.
This Micro Parachute Adams is tied in the original style (with the hackle wrapped along a quarter of the hook), with a tall sighting post and is in the original colours.
These are extremely small flies and are available in either size 20, 24 & even a size 28 (you'll need your magnifying glasses)!
Choose your size and then click "Add to Cart", you can adjust the quantities in your cart.