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How many eggs can a female mayfly lay?

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A mayfly (Ephemera vulgata) with delicate, veined wings and long tail filaments clings to a green blade of grass against a blurred green background. — mayfly An adult mayfly (Ephemera vulgata) in Europe.

Depending on the species, a female mayfly can produce fewer than 50 or more than 10,000 eggs.1