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City Nature Challenge

Boston Area City Nature Challenge

The City Nature Challenge is a fun worldwide collaborative bioblitz with cities across the world to document and identify the most species from April 28 - May 7! We'll be documenting urban biodiversity within the I-495 corridor, out to Stellwagen Bank, including Cape Cod and islands. It’s simple, it’s fun, and it contributes to scientific data helping to better understand our world and our non-human neighbors!

Information on CNC 2023 coming soon!



Join the Boston Area City Nature Challenge!

Step 1. Download the iNaturalist app and create an account.

• Download the app (easiest): Android App (Google Play) iOS App (iTunes), or use iNaturalist online.
iNaturalist "Getting Started" Guide.

Step 2: Record your observation with a photograph and upload the photo to the app.

Step 3: Confirmation

The iNaturalist community discusses and confirms the identity of the observation and lets you know.

Get Involved

CNC 2020

iNaturalist Project Page

bee on flower

Online Resources


Data Quests

Education Box1

Educator Resources

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About Us


The Boston Area City Nature Challenge is a collaborative project. Learn more about our effort here or email us at

Get social with the City Nature Challenge! Facebook |Twitter | Instagram

 CanaturalsciencescncThe City Nature Challenge is being organized on a global scale by the California Academy of Sciences and the Natural History Museum of Los Angeles County.