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Invented by citizen science staff at the Natural History Museum of Los Angeles County (Lila Higgins) and California Academy of Sciences (Alison Young). The City Nature Challenge is an international effort for people to find and document plants and wildlife in cities across the globe. It’s a bioblitz-style competition where cities are in a contest against each other to see who can make the most observations of nature, who can find the most species, and who can engage the most people.


In light of the COVID-19 pandemic, this year’s City Nature Challenge is no longer a competition. We want to embrace the collaborative aspect of the CNC this year and the healing power of nature to allow people to document their local biodiversity in whatever way they can.

Create your own iNaturalist account

  • Visit

  • Download the app from the AppStore or Google Play

  • Sign In

  • Start sharing your observations

  • Get feedback from actual scientists, experts, and other naturalists

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