1. a large aquatic insect with broad wings that is found near streams and ponds, whose larvae live in water
Usage: entomology

Examples

• The alderfly rested on the willow branch overhanging the creek.
• Fishermen often use alderfly larvae as bait for trout.
• The entomologist collected several alderfly specimens near the pond.
• Alderflies are commonly found around freshwater habitats in summer.
• The large wings of the alderfly make it easily recognizable.
• Children watched the alderfly emerge from its aquatic larval stage.