alderfly
/ˈɔːldərflaɪ/
noun
- A dark-colored insect of the family Sialidae, whose larvae live in water and adults are found near streams and rivers.
- Fishermen use artificial alderfly patterns to catch trout in fast-moving streams.
- The alderfly larvae are an important food source for many fish species.
- An alderfly landed on the rock beside the creek while we were hiking.