This is the most abundant species of Rhyacophila in much of the East, and every stage can be important to trout. The drifting larvae are important in early Spring, and the emergers and egg-laying adults become important in late Spring and early Summer.
You must log in at the top of the page to post. If you haven't registered yet, it's this easy:
Larvae: Many classes of aquatic insects, such as caddisflies, midges, craneflies, dobsonflies, alderflies, and many more, are known as "larvae" rather than "nymphs" in their juvenile stages. They have mostly soft bodies rather than hard exoskeletons. These insects also advance through a "pupa" stage before reaching adulthood.
Pupa: Any insect which spends most of its juvenile lifetime as a larva first becomes a pupa for a time before emerging as a fully grown adult. Depending on the species, the pupal form can be very important for fly fishermen to imitate.