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City Nature Challenge

Be A Citizen Scientist

Learn about this international event where people LIKE YOU record the natural world around them. This workshop will introduce you to the app/website used in this challenge, assist you in signing up to participate, and practice with hands-on tips and tricks for taking and sharing good pictures.

The City Nature Challenge (CNC) is an annual four-day nature census in which participants around the world use biodiversity recording platforms like iNaturalist to document nature in their neighborhoods. These contributions become data to understand and protect nature worldwide.

Join thousands around the world by sharing your observations of the natural world as part of the City Nature Challenge from April 24-27, 2026. Sign up to join the challenge online or in the iNaturalist app/website. Your images can help track flora and fauna. 

In 2025 the Indianapolis metro area had 286 individuals make 9,437 observations over the three days.

City Nature Challenge Goals

• Connect people to nature where they live
• Build community through collective action for local nature
• Make and share nature observations to help fight biodiversity loss
• Grow and support nature documentation globally
• Have fun doing science while collaborating with people around the world

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