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Boston Area City Nature Challenge

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. In a single weekend, over 66,000 people took part in the 2023 event, with over 1.8 million observations and 57,227 species identified! See full results.

View our team's observations

The City Nature Challenge is a fun worldwide collaborative bioblitz with cities across the world to document and identify the most species. During the challenge, we document 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!