City Nature Challenge

What is the City Nature Challenge?

The City Nature Challenge (CNC) is an international effort to document biodiversity by finding and documenting plants and wildlife across the globe. Cities are encouraging their community members to get outside and document the plants and animals in their region. The CNC is organized by the California Academy of Sciences and the Natural History Museum of Los Angeles County.

General information about the CNC

Further questions? Please email us.

Why should you participate?

There is nature all around us, even in our cities! Knowing what species are here and where they are helps us study and protect them, but the ONLY way to effectively do that is by working together (scientists, land managers, community members, you name it) to find and document nature in our area. By participating in the CNC, not only do you learn more about local nature, but you can also make our urban areas a better place – for you and other species!

When should I participate?

• Make your observations between Friday, April 26 and Monday, April 29. 
• Between April 30 to May 5, help us identify as many observations as possible within the project. 
• Observations must be uploaded by May 5 to count towards our total observations for the CNC. 
• Results announced on May 6.

How Can I Participate?

Here’s how you can get involved in the Denver-Boulder Metro area: