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In North America, dragonfly migrations occur annually in late summer and early fall. Although it’s not clear what species of dragonfly caused a stir among sunbathers this weekend, Virginia “Ginger” Brown, the leading dragonfly expert in the Ocean State, told NBC 10 WJAR in 2021 that witnessing such an abundance of dragonflies along the coast is a miracle.

While about 130 species of dragonflies are known in Rhode Island, Brown told WJAR that the Common Green Darner comprise the bulk of those that migrate on a yearly basis, with others accompanying their flights.

The Common Green Darner is the “best-known migrant dragonfly,” according to the Vermont Center for Ecostudies. The large specimens are found in Rhode Island and are known for being fast travelers and “water-loving” insects striking in appearance, with translucent wings and green coloration, according to InsectionIdentification.org.