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Mayflies (also known as shadflies or fishflies in Canada) are aquatic insects belonging to the order Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 families.

3 Comments on “Mayfly

  1. Thanks for the information and detailed photo! I saw two of these hitching a ride on my backpack last week but didn’t know what they were called. 🙂

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