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Chicago Ornithological Society

@chicagobirder.bsky.social
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All things birds in the Second City!

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Reposted by Chicago Ornithological Society
Laurie! Live! @laurie-merrell.bsky.social · 22/08/2026
friend forever problems for now
A close up photo of a barn swallow sitting on a wire, the bird is looking pretty straight ahead towards the camera. Behind the bird is an expanse of blue green water with the north face of the Chicago skyline out of focus in the distance
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Reposted by Chicago Ornithological Society
Robert Loerzel @robertloerzel.bsky.social · 23/08/2026
The North Park Village Nature Park is giving away milkweed plants.
Small potted plants sit on the ground near a sign that says:

Extra Miikweed
from Monarch-palooza
FREE! to good home
Plase take individual pots — inquire within for questions
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Reposted by Chicago Ornithological Society
Stephen Boisvert 🇨🇦 🟦⭐⭐⭐⭐🟦 @srboisvert.bsky.social · 20/08/2026
My fourth migratory warbler species of this fall was a rarer one. Golden-winged Warbler at Bill Jarvis Bird Sanctuary, Chicago. 8.19.2026 #birds #warblers
A Golden-winged Warbler perched on a branch near the very top of a very tall tree.
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Chicago Ornithological Society @chicagobirder.bsky.social · 22/08/2026
Optimist: The cup is half full Pessimist: The cup is half empty Crow: To the pebble heap!
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Reposted by Chicago Ornithological Society
Jennifer Mach (she/they) @jennifermach.bsky.social · 13/08/2026
Today's a great day to call or email your Chicago Alderman to support the Bird-safe building ordinance. Did you email or call? Please say yes!!! Thanks to @chicagobirder.bsky.social for the graphic.
Graphic titled "Birds under threat" and explaining that lots of birds die in window collisions in Chicago but a new ordinance would help prevent that
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Reposted by Chicago Ornithological Society
Crosby’s mom, Happy’s servant. @stevash.bsky.social · 13/08/2026
Did you know that Chicago is the deadliest American city for migrating birds? Chicago lies in a major flight path for millions of migratory birds. Contact your alderman below to co-sponsor the Bird-Friendly Building Design Ordinance. @chicagobirder.bsky.social chicagocollisionscoalition.org
chicagocollisionscoalition.org
Chicago Collisions Coalition: A New Bird-Friendly Building Law
Chicago residents can ask the city council to prevent bird-window collisions through a new mandatory bird-friendly building design ordinance.
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Chicago Ornithological Society @chicagobirder.bsky.social · 11/07/2026
"The study does more than just document a threatened bird adapting to city life – it highlights the growing role of urban green spaces as unexpected, yet vital, refuges for wildlife conservation." Read about the recent study of Lincoln Park Zoo's BCNH colony: bit.ly/4wBYree 📸 Katharine Spencer
Picture of two Black-crowned Night Herons from below, looking through tree branches
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Reposted by Chicago Ornithological Society
Stephen Boisvert 🇨🇦 🟦⭐⭐⭐⭐🟦 @srboisvert.bsky.social · 10/07/2026
Barn Swallow in flight at Jarvis Bird Sanctuary, Chicago #Birds
The underside of a Barn Swallow flying sideways over green foliage. Wings and tail spread.
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Reposted by Chicago Ornithological Society
Robert Loerzel @robertloerzel.bsky.social · 11/07/2026
Good morning from North Pond
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Chicago Piping Plovers @chicagopiping.bsky.social · 11/07/2026
Meet Wilco! Odie! Lucy! Bromley! They are the newest Puppers for Plovers! 🤍🐦🐶 We're thrilled to connect with Montrose's amazing dog community and celebrate the special bond between pups, people, and nature.
A dog with white and brown furA dog with black and brown fur A dog with golden fur and black ears and muzzleA dog with cream colored fur
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Chicago Ornithological Society @chicagobirder.bsky.social · 11/07/2026
To make this year’s Urban Birding Festival a success, we're looking for unique items and experiences for our Silent Auction. Your donations will directly fund festival scholarships and other initiatives that break down barriers to the outdoors. Email Jake Vinsel vinsel.jake@gmail.com for more info.
Text: Support the 226 Urban Birding Festival. Contribute to your local birding community! We are seeking donations and silent auction prizes! All proceeds directly support programming and future events. To get involved, email vinsel.jake@gmail.com Image: A yellow warbler perched on a branch, singing.
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Reposted by Chicago Ornithological Society
The Nature Conservancy @nature.org · 04/07/2026
Public lands are where many of us first fell in love with nature. But millions of acres could be at risk. We've stopped these efforts before, and we can do it again. This #4thofJuly, let's celebrate by telling Congress to keep public lands in public hands. 🌎 nature.ly/3SXNwwV
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Chicago Ornithological Society @chicagobirder.bsky.social · 03/07/2026
COS VP Christina shares interesting tales of banded birds spotted in Chicago. Learn how to report bird band sightings and what information you can expect in return. Read the full post at chicagobirder.org/blog/2026/6/12/bird-bands-in-the-wild
Text: Bird Bands in the Wild. New Blog Post. Information on Chicago-area bird spotted with bands--where did these birds come from, why are they  banded, and how can you report a banded bird? Images of a Red-tailed Hawk, Peregrine Falcon, and Osprey on a black background.Text: The Bird Files. Species: Peregrine Falcon. Date and location: May 2025 in Chicago on Willis Tower. Reported by J'orge Garcia. Notes: Male, banded in Chicago, two years old, known as "Harrison." Image of a Peregrine falcon clipped to file.Text: The Bird Files. Species: Red-tailed Hawk. Date and location: October 2023 in Garfield Park. Reported by: Christina Harber with photo by J'orge Garcia. Notes: Male, banded near Oregon, IL, less than one year old. Image of a Red-tailed Hawk clipped to file.Text: The Bird Files. Species: Osprey. Date and location: September 2025 in Romeoville, IL. Reported by: Pat and Steve Pearson. Notes: Banded in Billings, Montana, less than a year old. Image of an Osprey clipped to file.
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Reposted by Chicago Ornithological Society
Sami Mark @samimarkart.bsky.social · 24/06/2026
I’ve been loving spotting black crowned night herons in the city as they’ve been busy raising their fledglings in the trees above Lincoln Park Zoo. Had a go at drawing one! 🖤 🪶
a detailed illustration of a black crowned night heron on a rock looking down at a rushing river. it’s slightly wobbly reflection mirrors the bird. The illustration is a dark night scene with faint stars in the black sky.
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Reposted by Chicago Ornithological Society
Chicago Piping Plovers @chicagopiping.bsky.social · 02/07/2026
We are wishing everyone a happy and safe holiday weekend! If you visit Montrose, you will see more of your Chicago Piping Plover Monitors 🧡 there supporting Sea Rocket and Imani in protecting their chicks. 📸: Max Kelly (2026 Montrose chicks photographed end of June)
Three piping plover chicks standing on the sandText describing how plover allies can support the plover family at Montrose Beach
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Reposted by Chicago Ornithological Society
Robert Loerzel @robertloerzel.bsky.social · 03/07/2026
Check out my photo of the young bald eagles on this Chicago Tribune story: Meet Migizi and Marian: Chicago’s first bald eaglets born in a century named (gift link) www.chicagotribune.com/2026/07/02/c...
chicagotribune.com
Chicago’s first bald eaglets born in a century named
Chicago’s baby bald eagles finally have names, just in time for America’s 250th anniversary.
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Chicago Piping Plovers @chicagopiping.bsky.social · 14/04/2026
Welcome home, Sweet Prince 🤍 – Imani has also returned to Montrose! 🤍⭐️ The boys are back in town. Let's go!!! 📸: Chicago Piping Plovers (Imani and Pippin, Montrose Protected Beach, April 13, 2026)
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Chicago Piping Plovers @chicagopiping.bsky.social · 13/04/2026
Welcome home, Pippin! 🤍🟢 Our beloved Pippin has returned. Many will remember he departed last summer with something tangled around his foot. We feared the worst. Pippin has returned to us with his right foot missing and a limp but otherwise appears well. 📸:Liam Francis Shanley
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Chicago Ornithological Society @chicagobirder.bsky.social · 17/03/2026
On Wednesday, 3/18, HB3596, the Wetlands Protection Act, will be head in the Illinois Energy and Environment Committee. This act will codify state-level protections for wetlands in the face of the current administration and U.S. Supreme Court's attack on these precious ecosystems.
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Chicago Ornithological Society @chicagobirder.bsky.social · 07/02/2026
The U.S. House recently passed HR 4776, the SPEED Act. This act reforms the National Environmental Policy Act (NEPA), which requires federal agencies to determine the environmental impacts of major projects before they can be funded or approved. 1/x
Text: Attention birders! ACTION ALERT: Status: The U.S. House passed the SPEED Act. Next step: This bill goes to the U.S. Senate for a vote. Consequences: The changes set forth in the SPEED Act will make it easier for gas and oil companies to get approval on projects that negatively impact bird and other wildlife habitat. Action: Tell your senators to vote NO. Call Tammy Duckworth 202.224.2854, Dick Durbin 202.224.2152. Submit comments through the American Bird Conservancy form.
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Chicago Ornithological Society @chicagobirder.bsky.social · 04/10/2025
Join us at Big Marsh Park on October 11 for this showcase of the winners and runners-up from the 2025 Chicago Bird Photography Contest. Enjoy a short program with snacks and a raffle at the opening reception!
Promotional flyer for the "Chicago Bird Photography Contest Photo Exhibition" featuring a vibrant image of a Blackburnian Warbler by Riley Phoebus Mazock. The flyer invites viewers to an opening reception at Big Marsh Park on October 11, 2023, from 1–3 pm, with snacks, a short program, and a raffle. Event details and location are listed, along with logos and credits for the Chicago Audubon Society and Chicago Bird Alliance.
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Chicago Ornithological Society @chicagobirder.bsky.social · 05/09/2025
Now on the Chicago Birder Blog: Read the story behind the Urban Birding Festival. Registration for this year's festival closes Sunday. We hope you will join us! www.chicagobirder.org/blog/2025/9/...
chicagobirder.org
Urbs in Horto, Aves in Urbs — Chicago Ornithological Society
Read about how the Urban Birding Festival was born.
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Reposted by Chicago Ornithological Society
Robert Loerzel @robertloerzel.bsky.social · 14/07/2025
I recently noticed an unexpected bird singing in the Lincoln Yards site near the Hideout — a dickcissel. Here's my story about it for @chicagomag.com: www.chicagomag.com/city-life/th...
chicagomag.com
The Birdbrain Case for Stopping Lincoln Yards Development
The discovery of grassland-loving dickcissels on the site of Sterling Bay's stalled megadevelopment suggests the value of preserving open land.
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Chicago Ornithological Society @chicagobirder.bsky.social · 14/07/2025
You still have about two weeks to read "Turning to Birds" by Lily Taylor before joining us for Flock Club Book Club on 7/29 at the Jefferson Park library! We hope to see you all there. Please RSVP so we know how many treats to bring! www.chicagobirder.org/events/2025/...
chicagobirder.org
Flock Club Book Club: Turning to Birds — Chicago Ornithological Society
Join COS for Flock Club Book Club to discuss Lily Taylor’s Turning to Birds . In the spirit of our yearlong celebration of green birding, we’ll discuss this book’s mindfulness approach to birding.
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Reposted by Chicago Ornithological Society
Chicago Piping Plovers @chicagopiping.bsky.social · 13/07/2025
Piping Plovers move pretty fast. If you don't stop and look around once in a while, you could miss them. Blue Star will now be known as Ferris. 1/4
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Chicago Piping Plovers @chicagopiping.bsky.social · 13/07/2025
Hiya! I'm El. The El (for Elevated) is Chicago's transit system. Just like our Piping Plover family at Montrose, the El connects the city of Chicago, its surrounding suburbs, and the community it serves. 1/2
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Chicago Piping Plovers @chicagopiping.bsky.social · 13/07/2025
Hi! I'm Bean. The Bean, a beautiful sculpture by Anish Kapoor in Millenium Park, is beloved by locals and visitors alike. Its reflective surface captures and transforms the surrounding city skyline. 1/2
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Chicago Piping Plovers @chicagopiping.bsky.social · 13/07/2025
It's our Fledge Day and we have something more to reveal...our names! At 23 days, your Chicago Piping Plover chicks are officially fledged. Throughout the day, we will roll out the chicks' forever names in dedicated posts. 1/3 📸: Tamima Itani (The chick soon fka Red Star)
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Chicago Ornithological Society @chicagobirder.bsky.social · 12/07/2025
Join us for a birding and stewardship day at the Dunning-Read Natural Area on 7/19. Give back to the birds and the natural environment, and be a part of the Chicago community. RSVP: www.chicagobirder.org/events/2025/...
An illustration of a Blue Jay flying over a field of purple coneflowers. Text reads: Field Trip. Borbs & Forbs: Dunning-Read Natural Area. Saturday, July 19, 7:45 a.m.-noon. Dunning-Read Natural Area. 4050 North Oak Park Avenue. Chicago, Illinois. 60634. 7:45 a.m. Bird walk begins. 9:00 a.m. stewardship activities.
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Chicago Ornithological Society @chicagobirder.bsky.social · 05/07/2025
Friday! Join us for an afternoon walk to look for grassland birds at Horizon Farms in Barrington, IL. Event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Grassland Birds at Horizon Farms — Chicago Ornithological Society
RSVP Required Join COS in search of breeding grassland birds at Horizon Farm.
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Reposted by Chicago Ornithological Society
Chicago Piping Plovers @chicagopiping.bsky.social · 05/07/2025
Three!!! 🐥🐥🐥 Three updates from the Montrose Protected Beach - Saturday, July 5, 2025 🤍Your Chicago Piping Plover family - both parents and all three chicks - is doing well! 1/3 📸: Tamima Itani (Green Star)
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Bryce Read @brycefoot.bsky.social · 02/07/2025
This is a black bellied whistling duck. They’re normally in Texas and Mexico, so this guy is quite lost. Lots of birders geeking out in Lincoln Park right now, haha. #chicago #bird
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Reposted by Chicago Ornithological Society
1981 / 1986 News @40yearsago.bsky.social · 03/07/2025
[May 4th, 1980] A Chicago-area bird-watcher's guide lists common and uncommon bird species, their habitats, and expected stay periods, published weekly during migration season in The Tribune. #history #1980s
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Chicago Piping Plovers @chicagopiping.bsky.social · 02/07/2025
Eight-legged Imani?! During the first weeks after hatching, chicks are unable to maintain their own body temperature. The chicks spend much time tucked in under their parents' wings to stay warm. This is called "brooding." 📸: Ezra Quintero (Imani brooding his three chicks, Montrose, July 1, 2025)
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Chicago Ornithological Society @chicagobirder.bsky.social · 03/07/2025
On June 1 COS took a trip to Marian Byrnes Natural Area for a special Birds & Botany trip. Observations included Virginia Rail, Red-headed Woodpecker, Water Plantain, and Blue Flag Iris. www.chicagobirder.org/blog/2025/6/...
chicagobirder.org
Birds & Botany: Marian Byrnes Natural Area — Chicago Ornithological Society
COS member Kris Hansen recaps the bird walk at Marian Byrnes Natural Area on June 1, 2025.
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Chicago Ornithological Society @chicagobirder.bsky.social · 02/07/2025
The Chicago Bird Photography Contest closes August 1! Get your best shots in before it's too late! www.chicagobirder.org/chicago-bird...
An ad for a contest. Text reads: Announcing the 2025 Chicago Bird Photography Contest. The contest is a joint initiative of the Chicago Park District, Chicago Ornithological Society, and Chicago Bird Alliance. Submit by August 1. An image shows a Tufted Titmouse perched on the lens of a camera.
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Chicago Ornithological Society @chicagobirder.bsky.social · 01/07/2025
Join COS for an afternoon bird walk at Horizon Farm. This 400-acre hotspot boasts a strong sprawl of meadows and wetlands. We will walk a roughly 1-mile loop around the site in search of breeding grassland birds. The event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Grassland Birds at Horizon Farms — Chicago Ornithological Society
RSVP Required Join COS in search of breeding grassland birds at Horizon Farm.
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Chicago Ornithological Society @chicagobirder.bsky.social · 29/06/2025
Join us for Flock Club Book Club on July 29! We'll discuss Turning to Birds by Lili Taylor, reflecting on mindfulness, appreciation of the natural world, and living in the present. A Year of Green Birding event! RSVP at the link! www.chicagobirder.org/events/2025/...
Ad ad for an event Text reads COS Book Club. Tuesday, July 29, 2025. 5:30 p.m. to 7:30 p.m. Jefferson Park Library. 5363 West Lawrence Avenue. Chicago, Illinois, 60630. Coffee and snacks will be provided. 2025 A Year of Green Birding. The ad also shows the cover of the book "Turning to Birds: The Power and Beauty of Noticing" by Lily Taylor, which features an illustration of a Gray Catbird. Logos for The Chicago Ornithological Society and Flock Club appear at the bottom of the ad.
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Chicago Piping Plovers @chicagopiping.bsky.social · 28/06/2025
☀️ Imani with 2 of his 3 chicks ☀️ 📸: Chicago Piping Plovers (sunset June 27, 2025)
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Chicago Ornithological Society @chicagobirder.bsky.social · 29/06/2025
COS took a field trip to Douglass Park on May 29. 24 birders took an evening stroll where they observed actively feeding warblers and capped the night off with Common Nighthawks! www.chicagobirder.org/blog/2025/6/...
chicagobirder.org
Field Trip Recap: Douglass Park — Chicago Ornithological Society
COS member Kris Hansen recaps the walk at Douglass Park in the evening of May 31.
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Chicago Ornithological Society @chicagobirder.bsky.social · 27/06/2025
Join COS for an afternoon outing at Humboldt Park. The park is an excellent example of protecting native habitats in urban environments. We will walk roughly 1 mile on paved paths. Loaner binoculars will be available. The event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Bird Walk at Humboldt Park for Families and Beginners — Chicago Ornithological Society
RSVP Required Join us as we explore Humboldt Park on a bird walk tailored for new birders and families.
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Chicago Ornithological Society @chicagobirder.bsky.social · 26/06/2025
Join us on a short bird walk Saturday morning at Garfield Park, followed by a stewardship day. We will be identifying trees for the Garfield Park Tree Guide and doing litter pickup. The event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Borbs and Forbs: Garfield Park — Chicago Ornithological Society
RSVP Required Borbs and Forbs is a monthly event for nature enthusiasts and those inspired to give back to our communities. Each month we will visit a Chicago Park to admire local birds and other fa...
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Chicago Ornithological Society @chicagobirder.bsky.social · 25/06/2025
Join COS for a family-friendly beginner walk at Douglass Park on Friday evening. We will walk around the park’s lagoons in search of Chicago’s wild wonders as the sun sets. Loaner binoculars are available. This event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Bird Walk at Douglass Park for Families and Beginners — Chicago Ornithological Society
RSVP Required Attention families and beginners: end the daylight hours with a COS bird walk at Douglass Park.
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Chicago Ornithological Society @chicagobirder.bsky.social · 24/06/2025
This Thursday! Join us in a social event with real humans! We need 3D community now more than ever! We hope you can make it to The River Kitchen and Bar for drinks, food, and bird talk with your fellow bird nerds.
An ad for an event that includes imagery of a flamingo holding a tropical drink on top a background of colorful swirls and flowers. Text reads: Flock Club social event. Drinks. Food. Bird Talk. The River Kitchen and Bar. Thursday, June 26. 6 to 8 p.m. 2909 North Sheffield Avenue. Chicago, Illinois. The ad also shows the logo for the Chicago Ornithological Society.
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Reposted by Chicago Ornithological Society
Chicago Piping Plovers @chicagopiping.bsky.social · 22/06/2025
Perfect Rhythm This video from hatch day shows the perfect rhythm between plover parents Sea Rocket and Imani as they brood and mind two hatched chicks and continue to incubate two eggs. 🎥: Chicago Piping Plovers (taken via digiscope, June 20, 2025)
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Chicago Ornithological Society @chicagobirder.bsky.social · 22/06/2025
Now through September 27, visit the Newberry Library for Winging It, an exhibition that explores humanity’s complex relationship with birds, featuring contemporary and historic items from the library’s world-class collection. Sponsored in part by COS.
chicagobirder.org
Winging It: A Brief History of Humanity's Relationship with Birds — Chicago Ornithological Society
Head on over the Newberry Library for Winging It: A Brief History of Humanity’s Relationship with Birds, a COS-sponsored exhibit.
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Chicago Ornithological Society @chicagobirder.bsky.social · 21/06/2025
End the daylight hours with a COS bird walk at Douglass Park on June 25. New birders are welcome and loaner binoculars are available. After the bird walk ends, you can stay for the bat hike starting at 8:30! The event is free, but you must RSVP! www.chicagobirder.org/events/2025/...
chicagobirder.org
Sunset Bird Walk at Douglass Park — Chicago Ornithological Society
RSVP Required End the daylight hours with a COS bird walk at Douglass Park.
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Chicago Piping Plovers @chicagopiping.bsky.social · 20/06/2025
🐣🐣🐣🐣 The day we have waited for, worked for has come! All 4 chicks have hatched. Our work carries on as we continue to support Imani and Sea Rocket and their chicks. Thank you, as always, for your support. 📸: Chicago Piping Plovers (Imani removing an eggshell from the nest, June 20, 2025) 1/2
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Chicago Ornithological Society @chicagobirder.bsky.social · 21/06/2025
Join us for Flock Club, the social gathering by and for bird enthusiasts. On 6/26 we’re gathering at The River Kitchen and Bar. There is a variety of food and drinks (alcoholic and non-alcoholic) for purchase. Come and chat it up with your fellow birders! www.chicagobirder.org/events/2025/...
chicagobirder.org
Flock Club: The River Kitchen and Bar — Chicago Ornithological Society
COS proudly presents Flock Club - a social event by and for birders. Join us as we gather to share our passion for birds in a casual and accessible environment.
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Chicago Ornithological Society @chicagobirder.bsky.social · 19/06/2025
On June 1 COS took a field trip to Humboldt Park. The birders survived a Red-winged Blackbird dive bomb and enjoyed an assortment of summer birds, observing a total of 27 species, with the highlight being a close encounter with a flock of Cedar Waxwings. www.chicagobirder.org/blog/2025/6/...
chicagobirder.org
Field Trip Recap: Humboldt Park Sunday Social June 1 — Chicago Ornithological Society
COS member MaryKent Wolff recaps the Sunday Social bird walk in Humboldt Park June 1, 2025.
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