Mayflies in a Pennsylvania Stream (IMAGE)

Utah State University

Mayflies in a Pennsylvania Stream

Caption

According to a study conducted by scientists from Utah State University and the US Environmental Protection Agency, the mayfly Epeorus pleuralis, one of the many hundreds of species of stream insects whose frequencies of occurrence has declined relative to historical conditions.

Credit

David Funk, Stroud Water Resources Center, Pennsylvania

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Please credit David Funk, Stroud Water Resources Center, Pennsylvania

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