City Nature Challenge 2022, April 29 - May 2
Started in 2016 as a competition between 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 and around their cities, using biodiversity recording apps and platforms like iNaturalist. Run by the Community Science teams at the California Academy of Sciences and the Natural History Museum of Los Angeles County, the CNC is an annual four-day global urban bioblitz at the end of April, where cities are in a 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. The 2022 City Nature Challenge is gearing up to be the biggest one yet!
Participating is easy: just use iNaturalist to make and share observations of wild plants and animals in any of the nine Bay Area counties between April 29 and May 2, 2022. Be sure to check back here as well for information about City Nature Challenge events happening throughout the Bay Area.
City Nature Challenge 2021 Results
For the first time, the annual City Nature Challenge—one of the world’s largest community science events—recorded over 1 million wildlife observations! Over 400 cities participated, with more than 52,000 people making more than 1.2 million observations of nature in the four days of the challenge. Every observation made during the 4-day event, co-founded by the Academy, contributes important data to monitor and protect our planet’s biodiversity. Read the press release for more highlights.
More than 2,200 Bay Area residents racked up 32,100+ observations in 2021. The most-observed species? You guessed it: the California poppy (Eschscholzia californica). Other highlights include:
- a stunningly patterned long-nosed snake
- a stern gaze from a great horned owl
- the vulnerable and endemic Oakland mariposa lily
- a prowling mountain lion caught on a camera trap
- an otherworldly opalescent nudibranch
- and a decaying endangered fin whale recently necropsied by the California Academy of Sciences and The Marine Mammal Center
Long-nosed snake photo © Tony Iwane
Special thanks to our partners
From getting the word out to hosting events, the Academy's Bay Area partners make City Nature Challenge the inspiring, empowering, and fun 4-day nature bioblitz that it is—and we are incredibly grateful. Click the links below to learn more about each group.
California Native Plant Society | California Lichen Society | Bay Nature | San Francisco Department of the Environment | Nature in the City | Presidio Trust | Golden Gate Audubon Society | California Native Plant Society Yerba Buena Chapter | Sutro Stewards | Golden Gate National Recreation Area | San Mateo County Parks | Sequoia Audubon Society | Bioblitz.club | East Bay Regional Parks | California Center for Natural History | Community for Lake Merritt | Oakland Zoo | Oakland Museum of California | Wholly H2o | One Tam | Marin Municipal Water District | Marin County Parks | Sonoma Ecology Center | Sonoma County Parks | Pepperwood Preserve | Napa County RCD | Saved by Nature
Explore, observe, and document the plants and animals around you—even inside your house!
You don't need to venture too far from home to find exciting and surprising creatures! Download this PDF to get started.
Download this PDF and see if you can find all 25 of these commonly observed Bay Area (plant and animal) neighbors.
Don't have iNat yet? Download the app today and discover how fun (and easy) it is to document biodiversity in your neighborhood.
The work we do utilizes iNaturalist to make biodiversity observations while building community around nature. It's a community-powered website and app that makes it easy to upload and share your observations in the field and to get help from other users with flora and fauna IDs.