Swarm of Dragonflies on the Move

Blue dasher male (photo from Wikimedia Commons)

9 August 2024

Two weeks ago you may have seen videos on the Internet of a giant swarm of dragonflies at a Rhode Island beach on 27 July. The swarms at Westerly and South Kingstown were thankfully brief.

Entomologists identified the bugs as blue dashers (Pachydiplax longipennis) which spend their lives at quiet freshwater ponds and marshes but will swarm to seek out new ponds when their population is high. The 27 July bugs were on the move to somewhere else.

Blue dashers are common in the U.S. and are expanding into southern Canada. The males are gorgeous blue with green eyes, while the females and young males are black and yellow.

Male blue dasher (photo from Wikimedia Commons)
Blue dasher female (photo from Wikimedia Commons)

NBC 10 WJAR explains why the bugs visited the beach with on-the-spot videos from the day of the swarm.

video embedded from NBC 10 WJAR on YouTube

Learn Why were there swarms of dragonflies in Rhode Island? at WPRI.com.

One thought on “Swarm of Dragonflies on the Move

  1. Every year there comes a time when dragonflies appear at the Waterworks Mall near Aspinwall. I notice them dipping their abdomens onto shiny car hoods, thinking the shiny surfaces are water…are they trying to lay eggs?

    Dragonfly Haiku

    Strip-mall parking lot
    Shiny hoods draw dragonflies
    Searching for water

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