Juvenile
5cm - 10 cm with tail
McCoy’s Mouse is a topwater streamer pattern designed to imitate the frantic, struggling movement of a mouse swimming across the water’s surface. This fly is a proven producer of large, aggressive predators—especially grayling and big brown trout during low-light conditions or at dusk when surface activity peaks. Its buoyant construction and bushy profile create strong surface disturbance, triggering explosive strikes. Best fished with short, sharp strips and occasional pauses to mimic a fleeing rodent, it’s a go-to pattern for anglers seeking trophy fish willing to hit big topwater presentations.
Juvenile
5cm - 10 cm with tail
McCoy’s Mouse is a topwater streamer pattern designed to imitate the frantic, struggling movement of a mouse swimming across the water’s surface. This fly is a proven producer of large, aggressive predators—especially grayling and big brown trout during low-light conditions or at dusk when surface activity peaks. Its buoyant construction and bushy profile create strong surface disturbance, triggering explosive strikes. Best fished with short, sharp strips and occasional pauses to mimic a fleeing rodent, it’s a go-to pattern for anglers seeking trophy fish willing to hit big topwater presentations.
