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Philadelphia City Nature Challenge!

April 30 @ 6:00 am - May 3 @ 10:00 pm

Friends of the Wissahickon is participating in the third annual Philadelphia City Nature Challenge! Between April 30 and May 3, 2021, Philadelphia and its adjacent counties will be competing against other cities in the world to see who can find the most species in their regions. Using the free iNaturalist app, we hope to help document the biodiversity of plants and wildlife of our city. Join us in fun community science to see if we can discover new species or even beat our previous totals!

If you are interested in contributing and helping Philly win, download the iNaturalist app (or visit the website) and start documenting the wildlife in your area. You can keep track of observations in the Wissahickon at on our BioBlitz page here. Get started at!

Learn how to use iNaturalist with PA Master Naturalist Nicole Cantwell!


April 30 @ 6:00 am
May 3 @ 10:00 pm