noun
- a winged insect with long antennae whose larvae develop in clean, fast-flowing streams and rivers
Usage: entomology
Examples
- The stonefly nymph clung to the rocky bottom of the mountain stream.
- Fly fishermen often use artificial stonefly patterns to catch trout.
- Stoneflies are indicators of good water quality in freshwater ecosystems.
- The adult stonefly emerged from the water and rested on a nearby boulder.
- Scientists study stonefly populations to monitor stream health.
- Large stoneflies can have wingspans of up to three inches.