The standard Adams is probably the best-known fly in America, but the parachute version will fish circles around the original. The low-floating body shows the fish an unobstructed silhouette, while the white upright wing is highly visible to the angler, even on very small flies. This is a fine hatch-matching pattern for any of the darker-colored mayflies, but it also produces during caddis hatches when trout, I believe, take it for an emerger. Above all, it is a superb pattern for searching the water when no fish are showing. This is one of my flies of first resort.