On which continent are mayflies absent?

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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.

Mayflies are found on every continent except Antarctica. They are a diverse group of insects belonging to the order Ephemeroptera, with more than 2,500 species described worldwide.1