The Parachute Blue Winged Olive Dry Fly is the parachute style tie of the classic BWO, or Blue Winged Olive mayfly of the Genus Baetis and related mayflies. Hatches occur as early as February and gather momentum through June, take a slight break except for cloudy days during the summer, and then come back with a vengeance in late summer through November. In spite of all the new BWO patterns being originated, seemingly one a day, this classic parachute style BWO tie in various sizes will take trout whenever the hatch is on strong.