Join us on a hike through the woods to observe early spring migrants as well as the wood's year-round residents. All ages and experience levels are welcome!
Join us for a program all about the mysterious nighthawk; what makes them tick, why are they disappearing, and what's being done to save them right here in Chicago.
In cooperation with Third Coast Birding and Peggy Notebaert Nature Museum, COS is proud to continue our long tradition of Wednesday morning bird walks at North Pond!
Join us as we explore the string of lakes along the Des Plaines river in search of migrating waterfowl and a chance to see Red-breasted Mergansers stage their amazing courtship displays.
In cooperation with Third Coast Birding and Peggy Notebaert Nature Museum, COS is proud to continue our long tradition of Wednesday morning bird walks at North Pond!
In cooperation with Third Coast Birding and Peggy Notebaert Nature Museum, COS is proud to continue our long tradition of Wednesday morning bird walks at North Pond!
Join us on a hike through the woods to observe early spring migrants as well as the wood's year-round residents. All ages and experience levels are welcome!
In cooperation with Third Coast Birding and Peggy Notebaert Nature Museum, COS is proud to continue our long tradition of Wednesday morning bird walks at North Pond!
Join Chicago Park District, Friends of Big Marsh, and Chicago Ornithological Society for the return of the Mudhen 5k fun run at Big Marsh Park on Saturday, March 14!
Peregrine Falcons are right at home in Chicago’s urban cliffs and canyons and can be seen tearing through the sky in search of food for hungry chicks. Join COS President Edward Warden as we go out in search of these mighty birds and see them in action.
Join COS for a beginner-friendly winter bird walk at Montrose Point, where we’ll learn birding basics while spotting Chicago’s year-round residents and seasonal visitors.
In cooperation with Third Coast Birding and Peggy Notebaert Nature Museum, COS is proud to continue our long tradition of Wednesday morning bird walks at North Pond!
COS proudly presents Flock Club, the social event by and for birders! Join us as we gather to share our passion for birds in a casual and accessible environment.
Join COS for the latest episode of our virtual program series Birds & Bytes for a conversation with Em De Blas on lessons learned while birding Oaxaca.
