stonefly
/ˈstoʊnˌflaɪ/
noun
- An insect with two pairs of wings that lives near streams and rivers; its nymphs live in water and are often used as bait for fishing.
- Stoneflies are often found resting on rocks near fast-moving water.
- A stonefly hatch can trigger a feeding frenzy among fish.
- The stonefly nymph is a favorite bait for trout fishermen.