NHSM is proud to be a part of the City Nature Challenge again in 2022. The City Nature Challenge ( is an annual friendly competition among cities across the globe to find and photograph/document plants and wildlife over a four-day period (April 29 – May 2) using the iNaturalist app.

The Natural History Society of Maryland would like to make sure you are ready for this bioblitz! You don’t need to be a wildlife expert—all skill levels are welcome to participate. Download iNaturalist and join us for an evening presentation on the City Nature Challenge and learn how to use the app so you can practice all that you’ve learned to participate to this international BioBlitz.

Why participate? There is nature all around us, even in our cities! Knowing what species are in our metro area and where they are helps us study and protect them, but the ONLY way to do that is by all of us—working together to find and document the nature in our area. By participating in the CNC, not only do you learn more about your local nature, but you can also make your city a better place—for you and other species!

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 their cities. 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 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.