Join us for a habitat restoration workday at COS’s flagship stewardship site LaBagh Woods, and help bring back critical bird habitat.

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!

RSVP Required

Join COS for the 76th Annual Lisle Christmas Bird Count and Dinner! Every year on a wintery Sunday in December, birders sally forth to count birds and contribute their sightings to the oldest continuously running citizen science project in the world.

In partnership with the Chicago Park District, come and learn about the raptor of the night- the owl! This interpretive program and guided walk will lead participants through the preserve in search of owls.

RSVP Required

Join COS for an owl prowl at Hegewisch Marsh.

In partnership with the Chicago Park District, come and learn about the raptor of the night- the owl! This interpretive program and guided walk will lead participants through the preserve in search of owls.

COS proudly presents the newest social event by and for birders; Flock Club! Join us as we gather to share our passion for birds in a casual and accessible environment.

RSVP Required

Join COS for an owl prowl at Hegewisch Marsh.

Join us for a habitat restoration workday at COS’s flagship stewardship site LaBagh Woods, and help bring back critical bird habitat.

RSVP Required

Join us for a slow-paced outing at Humboldt Park. In late November this park is bustling with late migrants, including Fox, White-throated, and Swamp Sparrows, as well as winter residents such as Cooper's Hawks, American Tree Sparrows, and Dark-eyed Juncos.

RSVP Required

Join Chicago Ornithological Society at North Park Village Nature Center as we take a deep dive into everything we know about Chicago's many owls!

In partnership with the Chicago Park District, come and learn about the raptor of the night- the owl! This interpretive program and guided walk will lead participants through the preserve in search of owls.

Join us for a habitat restoration workday at COS’s flagship stewardship site LaBagh Woods, and help bring back critical bird habitat.

RSVP Required

Join us for a walk at the Dunning-Read Natural Area. Then at 9 a.m. we'll join the site steward for a workday in which we help improve the natural areas so important to these migrating birds.

RSVP Required

Chicago Ornithological Society and the Field Museum invite you to join us for the final event in the Year of the Peregrine Falcon! This short film screening and panel event will feature new and cutting edge footage of Peregrines in action taken 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!

RSVP Required

Join Chicago Ornithological Society at North Park Village Nature Center as we take a deep dive into everything we know about Chicago's many owls!

RSVP Required

Join Chicago Ornithological Society at the Ford Calumet Environmental Center as we take a deep dive into everything we know about Chicago's many owls!

RSVP Required

Join us for the latest installment of the Compelling Voices in Conservation and Birding series.

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 for a habitat restoration workday at COS’s flagship stewardship site LaBagh Woods, and help bring back critical bird habitat.

RSVP Required

Join COS as we check out Rainbow Beach for fall and winter arrivals and waterfowl.

Join the friends, neighbors, and Chicago Park District staff for a series of nature walks and stewardship days this summer and fall as we learn about and help care for this important natural resource.

RSVP Required

Join COS as we check out Montrose Point for fall and winter arrivals and waterfowl.

RSVP Required

Join COS for an owl prowl at Park 566. We will look for owls of all kinds but will focus on finding Short-eared Owls that are seen there frequently. Beginning birders welcome and loaner binoculars will be available.

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!

RSVP Required

Would the Peregrine Falcon win election today? Join Chicago Ornithological Society and the Peggy Notebaert Nature Museum as we answer that very question! Like any proper democratic election cycle, this calls for a debate.

Join us for a fall migration walk at Park 566! This uniquely urban habitat is host to countless migratory birds and one of the best places in Chicago to observe grassland birds, raptors, waterfowl, and many other species on their journey north.

RSVP Required

Join us for short, slow walk at the Rutherford-Sayre Natural Area in the Galewood neighborhood. Then at 9 a.m. we'll join the Rutherford-Sayre steward for a workday in which we help improve the natural areas so important to these migrating birds.

RSVP Required

Join COS for a duck-themed trip to Montrose Point Bird Sanctuary.