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Boston Area City Nature Challenge

THANK YOU to everyone who participated in this year's City Nature Challenge! We are so proud of what we accomplished this year. Out of 1.7 million observations, 67,000+ observers, and 50,000+ total species identified, here's how our Boston Area team ranked:
  • Placed 3rd in number of observations (46,896)
  • Placed 4th for number of participants (1,990)
  • Placed 11th for the number of unique species identified (2,731)
  • View collective results
Noteworthy Observations

April 29 – May 2, 2022

Join the City Nature Challenge, a fun worldwide collaborative bioblitz with cities across the world to document and identify the most species! We're 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!


The participant with the most iNaturalist observations in this year's challenge could be featured on our social media pages and win a behind-the-scenes tour! Learn more.

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

Blandingsturtle3 Box

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.