Firefly Watch: View & Explore Data from 2021

The map below shows 2020 firefly observation data. Click on an individual marker to see a participant's first and last recorded observations at that location. See the legend below the map for an explanation of the "fireflies seen" icons.


"Fireflies Seen" Legend

Icons indicate the average of all 3 counts submitted per observation period. 

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1-5 fireflies seen
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6-10 fireflies seen
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11-25 fireflies seen
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More than 25 fireflies seen

Firefly Density Map

We worked with volunteers at Mapbox to create a visualization of firefly report density from the observations collected during the summer of 2021. Adjust the slider to see how the reported firefly numbers vary week to week through the summer.

View the map fullscreen >

Week of


"Visualization of firefly reports in 2021" created by Matthew Smith and Mapbox volunteers Lo Benichou and Sam Fader.