Mayfly and Shadfly

Mayfly noun - Slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days.

Shadfly is a synonym for mayfly. In some cases you can use "Shadfly" instead a noun "Mayfly".

Shadfly noun - Slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days.

Mayfly is a synonym for shadfly. You can use "Mayfly" instead a noun "Shadfly".