The Hendrickson fly pattern is a classic and essential choice for early spring fly fishing, especially designed to imitate the Ephemerella subvaria mayfly species. Perfect for Eastern North American rivers, this fly thrives during the Hendrickson hatch, typically from late April through May. It features a delicate pink to reddish-brown body with matching wings, closely resembling the natural insect. Anglers should use this pattern with a dry fly technique, presenting it gently on the surface of the water to mimic the adult mayfly’s natural behavior and entice selective trout.