Started in 2016 as a competition between the cities of San Francisco and Los Angeles, the City Nature Challenge (CNC) has grown into an international event, motivating people around the world to find and document wildlife in their cities.
Run by the Community Science team at the California Academy of Sciences and the Nature History Museum of Los Angeles County, the CNC is an annual four-day global bioblitz at the end of April where cities work in collaboration-meets-friendly-competition to see not only what can be accomplished when we all work toward a common goal, but also which city can gather the most observations of nature, find the most species, and engage the most people in the event.
In light of the COVID-19 pandemic, this year’s City Nature Challenge will not focus on competition; instead, we’ll embrace the healing power of nature and celebrate tens of thousands of people all around the world, searching for and documenting their local biodiversity together in this event.
We encourage you to get outside, explore our natural world, and participate in the City Nature Challenge 2021 in the Presidio by using the California Academy of Sciences’
iNaturalist app to record your findings.