Brushlegged Mayfly

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Brushlegged Mayfly

The Brushlegged Mayfly (Ephemeroptera) is in Old Quebec City, Quebec, Canada. Mayflies are unique among insects because they moult one more time after acquiring functional wings, known as the alate stage. This penultimate winged instar usually lives a very short time, often a matter of hours, and is known as a subimago or, to fly fishermen, as a dun. Mayflies in this stage are a favorite food of many fish, and many fishing flies are modeled to resemble them. The adult mayflies are short-lived, from a few minutes to a few days, depending on the species. About 2,500 species of mayflies are known worldwide, including about 630 species in North America. (Photo by Creative Touch Imaging Ltd./NurPhoto)


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