We are thrilled to announce that the SDSU Biodiversity Museum is co-organizing San Diego County’s 2025 City Nature Challenge with the San Diego Natural History Museum.
The 2025 City Nature Challenge is a 4-day, worldwide collaboration to get people observing the natural world—and The Nat and SDSU Biodiversity Museum are coordinating San Diego’s annual participation! We’re using the free iNaturalist app to tally results for observations made in San Diego County.
It’s easy to participate! All wild plants, animals, and fungi count, even non-native species. On the iNaturalist 2025 San Diego County City Nature Challenge Project Page, your observations will directly contribute to science.
The 2025 San Diego County City Nature Challenge Portal has all the information you need to know about how to participate, including the many local events that you can sign up for!
Our Biodiversity Museum has a long history of local biodiversity research, and a particularly rich history of collaboration with researchers at The Nat. The Biodiversity Museum’s active role in the organization of the CNC continues this tradition and aligns with our current efforts to be more accessible and connected to the community.
