Mayfly exuvia (molted skin)

Nymphs live in freshwater lakes, rivers, and streams; adults and subimagos dwell on nearby vegetation or structures.

Nymphs eat algae and organic debris; adults have non-functional mouthparts and do not eat.

Mayflies are unique for molting once more after reaching a winged stage (subimago). They often emerge in massive swarms to mate and die within hours or days.

Harmless to humans; vital ecological role as a food source for fish and birds, and serves as an indicator of good water quality.