Most people know about monarch butterfly migration, but there are actually other insects in the US that migrate. That includes 16 species of American dragonflies!

Some researchers actually attached tiny radio transmitters to some Green Darners and followed their movements. The average distance migrated was 58 km (about 36 miles), but some dragonflies traveled twice that distance.

A paper from 1998 described mass autumn migrations of dragonflies (Odonata) in Illinois, New Jersey, and Florida. The description of the Chicago migration event is delightful–one of the authors was working in his office at the Field Museum and noticed a giant swarm of dragonflies passing by:

“The flux of migrants was estimated from the museum rooftop by counting dragonflies as they passed through a 400-M2 (40 m long X 10 m deep) vertical window to the E. …At the point where migrants were passing the museum, the dragonfly stream was estimated to be 850 m wide. Assuming that passage rates were constant throughout the 5-h period during which the migration was in progress, ca. 1.2 million dragonflies were estimated to have been involved in the flight.”

Would you like to help document more dragonfly migration?

The Migratory Dragonfly Partnership (MDP) has started a citizen science project to investigate the movements of two migratory dragonflies: the Common Green Darner (Anax junius) and Black Saddlebags (Tramea lacerata).

You agree to visit the same wetland or pond site on a regular basis, and then report the arrival of migrant dragonflies moving south in the fall or north in the spring. They also would like to know when the first resident adults of these species emerge in the spring. Sign up at Dragonfly Pond Watch.

More info about migratory dragonflies:

[Beautiful photo of a green darner courtesy tlindenbaum]

bug_girl

bug_girl

Bug_girl has a PhD in Entomology, and is a pointy-headed former academic living in Ohio. She is obsessed with insects, but otherwise perfectly normal. Really!
If you want a daily stream of cool info about bugs, follow her Facebook page or find her on Twitter.

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5 Comments

  1. Avatar of criticaldragon1177
    May 26, 2012 at 12:21 am —

    Bug Girl,

    This is pretty interesting. We don’t hear
    much about the migratory habits of Insects

  2. Avatar of criticaldragon1177
    May 26, 2012 at 12:21 am —

    Bug Girl,

    This is pretty interesting. We don’t hear
    much about the migratory habits of Insects

  3. Avatar of criticaldragon1177
    May 26, 2012 at 12:22 am —

    Sorry I left the same comment twice. I didn’t mean to do that.

  4. Avatar of tosufai
    May 27, 2012 at 7:35 am —

    I didn’t know about monarch butterfly migration…or that insects migrated at all. Now I feel bad. But at least I learned something new, thank you!

  5. Avatar of Jack99
    May 27, 2012 at 10:50 pm —

    I just want to say how much I always enjoy the Bug Girl posts. To me there is something quite relaxing and calming about the study of insects.

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