City Nature Challenge Weekend


New Yorkers are invited to connect with nature at free, fun events throughout the five boroughs.



Macaulay Honors College, CUNY is thrilled to be the official New York City host of the City Nature Challenge for the 7th consecutive year. Join us in supporting science education, sustainability, and environmental awareness. Over 491 cities across 51 countries will participate this year!

After observation days have ended, the iNaturalist community will help properly identify and catalog the species in a marathon tech session. Final results will be announced by iNaturalist (and on this page).


Special Thanks

Macaulay Honors College is the NYC organizer of the City Nature Challenge, generously supported by the New York City Council and the office of Council Member Gale Brewer.

In addition, we thank the following partner organizations for participating:

Alley Pond Environmental Center, American Museum of Natural History, Billion Oyster Project, Brooklyn Bridge Park, Brooklyn Greenway Initiative, City Parks Foundation, Eastern Queens Alliance, Fort Greene Park Conservancy, Friends of McGolrick Park, Friends of Spuyten Duyvil, Genspace, Girl Scouts of Greater NY, Green-Wood Cemetery, Greenbelt Conservancy, Jamaica Bay Rockaway Parks Conservancy, Local Nature Lab, Macaulay Honors College, Manhattan Land Trust, Natural Areas Conservancy, New York Botanical Garden, North Brooklyn Parks Alliance, NYC Parks, NYC Pollinator Working Group, Pratt Institute Math & Science Department, Randall’s Island Park Alliance, Solar One, The Bee Conservancy, The High Line, Torrey Botanical Society, Trust for Governors Island, Urban Park Rangers, Van Cortlandt Park Alliance, and Washington Square Park Eco Projects.

The City Nature Challenge is globally organized by the California Academy of Sciences and the Natural History Museum of Los Angeles County.

The first step in the City Nature Challenge: download the free app! You’ll use it to record your observations and share them with other citizen scientists.

Learn more

Android App on Google Play


Email or text/call (262) 228-8682.