Swarm Sunday (Part 2): 9/8/2013 – 9/14/2013

Dragonfly Swarm Project logo

As promised, here is the overdue data for the week of 9/8/2013, the biggest week of the year so far – and likely the biggest week of the 2013 season.  Swarms occurred in the following locations:

Burlington CO
Branford CT
Ocoee FL
Panama City Fl
The Villages FL
Davenport IA
Maquoketa IA
Chiacgo Ridge IL
Coal city IL
Downers Grove IL
Elk Grove Village IL
Evanston IL
Frankfort IL
Oak Lawn IL
Park Ridge IL
Stockton IL
Sycamore IL
Virginia IL
Western Springs IL
Chicago IL (6 reports)
Columbia City IN
Peru IN
Wayne IN
Largo IN (2 reports)
Shreveport LA
Marshfield MA
Vineyard Haven MA
Clayton MI
Horton MI
Hudson MI
Reading MI
St Quincy MI
Manchester MO
Grand Island NE
Lincoln NE
Omaha NE (2 reports)
Papillion NE
Waverly NE
Oswego NY
Tomkins Cove NY
Akron OH
Austintown OH (2 reports)
Avon Lake OH
Bellevue OH
Canfield OH
Clintonville OH
Columbus OH (2 reports)
Danville OH
Edon OH
Fairview Park OH
Farmersville OH
Farmington OH
Fostoria OH
Fremont OH
Germantown OH (2 reports)
Haviland OH
Homer OH
Lakewood OH
Loudonville OH
Louisville OH (4 reports)
Lower Salem OH
Marion OH
Massillon OH
Mentor on the Lake OH
Mesopotamia OH (2 reports)
Middletown OH (2 reports)
Milan OH
Mount Vernon OH
Newark OH
Newton Falls OH
North Jackson OH
Norton OH
Payne OH
Petersburg OH
Pickerington OH
Randolph OH
Scio OH
Springfield OH
St. Paris OH
Tallmadge OH
Toledo OH (5 reports)
Warren OH (2 reports)
Wellington OH
Willard OH
Youngstown OH
Erie PA
Greencastle PA
Huntingdon PA (2 reports)
Lewistown PA
McVeytown PA
Mt. Union PA
Pittsburgh PA (4 reports)
West Middlesex PA
Sewanee TN
Houston TX
Spearman TX
Roanoke VA
Toronto ON

And here’s the map:

9.8.13 - 9.14.13

Red pins are static swarms, blue pins are migratory. Click the map to enlarge!

Nearly all the swarms reported during the week of September 8 were reported from just three days, Sept 10-12, with most taking place on Sept 11.  Sept 11 was a really big swarm day!  However, nearly all swarms reported during the week were also static feeding swarms, NOT migratory swarms as one would expect at this time of year.  There were a lot of dragonflies out and about, but few people reported them on the move. 

You’ll notice that the majority of swarms occurred in the upper Midwest, specifically in Illinois, Indiana, Ohio, and Pennsylvania.  Could this potentially mark the start of a large migration still to come?  It’s possible, and time will tell whether the people who reported these swarms were seeing dragonflies on evening stopovers during their migrations or there were simply a lot of dragonflies active those few nights.  I suspect the latter was true, that we might still see some southward movement of the dragonflies this year, but we’ll have to wait and see what the next few weeks bring.  It’s starting to cool down in many places in the country, so the end of the season is almost upon us.

Don’t forget to report any late-season swarms you see!  The season might be over, as it usually is at this time of year, but there’s a chance we’ll see one more burst of activity.  With your help, we can figure out which of these scenarios is more likely, so keep sending in your reports!


Have you seen a dragonfly swarm? I am tracking swarms so I can learn more about this interesting behavior.  If you see one, I’d love to hear from you!  Please visit my Report a Dragonfly Swarm page to fill out the official report form.  It only takes a few minutes! Thanks!


Want more information? Visit my dragonfly swarm information page for my entire collection of posts about dragonfly swarms!


Unless otherwise stated, all text, images, and video are copyright © C. L. Goforth