Brief Summary
provided by Ecomare
In the Netherlands, there are at least 59 species of mayflies. The mayfly lives in fresh water as larvae (nymph). In the spring, it crawls out of the water and together they form large swarms of millions of flies. Because mayflies often only live from a few hours to a maximum of a couple of weeks, they have no mouth. The only thing that an adult mayfly is concerned about is reproducing.
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