The Rusty Spinner is the go-to dry fly for imitating spent mayfly spinners of the brown variety. These fishing flies are some of the best to tie behind larger mayfly dries in a double dry fly pattern. They work in just about every size and will float right in the sweet spot of slow-moving sections of the river. They benefit from a simple design and the ability to catch fish nearly anywhere. Be sure to keep an eye out for the spinner falls in the spring and summer occurring in the afternoons. When you see it happen, you’ll have this fly in your box and know exactly what to do.