One of my blog followers ask for pictures of common mayflies. Before I post some of the popular flies mentioned in previous posts, I decided to start with the life cycle of a fly…so as fly fisherman, we can understand what the trout are feeding on in various stages.
Simply put, the stages are: egg, nymph, emerger, dun, spinner, adult mayfly
Spinners: Mature females lay their eggs on the water producing larvae.
Nymphs: The larvae turn into nymphs – when trout are not rising they are likely feeding on nymphs.
Emergers: Nymphs migrate or emerge to the surface, therefore called emergers.
Duns: When the nymph molts (produce wings) the bug is now called a dun. The dun sits on the surface in order to dry its wings and then becomes an adult mayfly.
Adult mayflies then become spinners…the males and females mate…. the females lay their eggs on the surface and the cycle starts all over again.
The types of flies are cyclical, so it is now up to us fly fisherman to focus on the type of fly, size, shape and color. Since, I mentioned on previous posts, that I am a dry fly fisherman, I focus on the duns and adult mayfly/spinner stages. Stay tuned for the more popular ones on the Pennsylvania trout streams.