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April 28, 2023 - May 1, 2023
All Day
Lexington, MA 02420
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Observations Needed for the 2023 Lexington City Nature Challenge

Friday, April 28, 2023

City Nature Challenge logo Lexington is once again participating in the City Nature Challenge: a worldwide event when participants document as many wild organisms as possible. Observations can be WILD plants, animals, fungi, bacteria, etc., or even evidence of those organisms like tracks, scat or feathers. Grab your smart phone or camera and head outdoors to participate in the challenge!

The event takes place Friday, April 28th through Monday, May 1st and observations can be recorded via the iNaturalist App on a smartphone. 

In 2022, Lexington had 836 Observations, 307 Species and 49 Observers during the City Nature Challenge. Let's see if we can double those numbers this year!

How to Participate:

Step 1: Download the iNaturalist app from the App Store or Google Play 

Step 2: Find and photograph wild observations anywhere in Lexington

Step 2: Share your observations in the iNaturalist app. 

Step 4: Learn more as your find gets identified

Watch the 2023 City Nature Challenge Video

Join a Guided Walk for the City Nature Challenge. Join us for the guided walks to learn more about how you can contribute to the worldwide database of living things. To register, please email Amber Carr at 

Saturday 4/29 at 1:00 PM: Willard's Woods North Street entrance

Sunday 4/30 at 1:00 PM: Whipple Hill Winchester Drive entrance (overflow parking along Berkshire Drive) 

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