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COS Blog

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Field trip recap: Marian R. Byrnes Natural Area
Field trip recap: Marian R. Byrnes Natural Area

COS member Kris Hansen recaps the rail-friendly Birds and Botany walk at Marian R. Byrnes Natural Area April 19.

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Field TripKris HansenApril 25, 2026Marian Byrnes, Birds & Botany
Field Trip Recap: Woodcock Walk at Air Station Prairie
Field Trip Recap: Woodcock Walk at Air Station Prairie

COS member Lauren Kostas recaps the Woodcock Walk at KEnt Fuller Air Station Prairie on March 24, 2026.

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Field TripKris HansenApril 23, 2026Kent Fuller Air Station Prairie
Field trip recap:  Bilingual Calumet Park Birdwalk / Paseo Bilingüe Parque de Calumet
Field trip recap: Bilingual Calumet Park Birdwalk / Paseo Bilingüe Parque de Calumet

COS trip leader Em de Blas recaps the bilingual bird walk at Calumet Park. Em de Blas, líder de excursiones de la COS, hace un resumen de la caminata bilingüe de observación de aves en Calumet Park.

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Field TripKris HansenApril 21, 2026Calumet, bilingual
Field Trip Recap: Wild Goose Chase at Humboldt Park
Field Trip Recap: Wild Goose Chase at Humboldt Park

COS member Kate Allgeier recaps the Sunday Social Bird Walk at Humboldt Park April 5 that culminated in a wild goose “chase.”

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Field TripKris HansenApril 19, 2026Humboldt Park
Field trip recap: Black Feather Walk
Field trip recap: Black Feather Walk

COS member Carrie Lakin recounts late-afternoon birding in search of Goth birds at Humboldt Park.

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Field TripKris HansenApril 17, 2026
Field Trip Report: Baker's Lake
Field Trip Report: Baker's Lake

COS member Kris Hansen recaps the midday bird walk at Baker’s Lake in the northwest corner of Cook County.

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Field TripKris HansenApril 15, 2026Baker's Lake, COS in the Suburbs
Field Trip Recap: LaBagh Woods
Field Trip Recap: LaBagh Woods

COS member Kris Hansen recaps the bird walk at LaBagh Woods on Friday, April 10.

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Field TripKris HansenApril 11, 2026LaBagh Woods
Field Trip Recap: Woodcock Walk at Marian Byrnes Park
Field Trip Recap: Woodcock Walk at Marian Byrnes Park

COS member Joann Umeki recaps the 150th bird walk that President Edward Warden has led for COS.

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Field TripKris HansenApril 7, 2026Marian Byrnes
Field Trip Recap: Woodcock Walk at Indian Boundary Prairies
Field Trip Recap: Woodcock Walk at Indian Boundary Prairies

COS member Kris Hansen recaps the walk at Paintbrush Prairie that found no American Woodcocks but lots of Wilson’s Snipe and garter snakes.

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Field TripKris HansenApril 5, 2026
Field Trip Recap: Montrose Point Beginner Bird Walk
Field Trip Recap: Montrose Point Beginner Bird Walk

COS member Lauren Kostas recaps the Montrose Point Beginning Birder walk Feb. 28.

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Field TripKris HansenMarch 30, 2026Montrose Point
Field Trip Recap: Sunday Social at Humboldt Park
Field Trip Recap: Sunday Social at Humboldt Park

COS member Steve Whitman recaps the Sunday Social at Humboldt Park on March 15.

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ProgramKris HansenMarch 17, 2026Humboldt Park
The Cranes Have Landed
The Cranes Have Landed

Read about last year’s close encounters with Sandhill Cranes around Chicago.

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Robyn DetterlineMarch 14, 2026Humboldt Park, Montrose Point
Field Trip Recap:  Peregrine Walk
Field Trip Recap: Peregrine Walk

COS member Kris Hansen recaps the successful Peregrine Walk on Sunday, March 8, in the West Loop.

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ProgramKris HansenMarch 10, 2026Loop, peregrine
Field Trip Recap:  Humboldt Park Sunday Social
Field Trip Recap: Humboldt Park Sunday Social

COS member Carrie Larkin recaps the Feb. 15 Sunday Social at Humboldt Park.

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ProgramKris HansenMarch 1, 2026Humboldt Park
Field Trip Recap: Starved Rock Scramble
Field Trip Recap: Starved Rock Scramble

Trip leader Vinod Babu recaps the February 7 birding caravan across LaSalle County.

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Field TripRobyn DetterlineFebruary 19, 2026Starved Rock
2025 Big Marsh Bird Banding Recap
2025 Big Marsh Bird Banding Recap

Lindsay Welbers recaps the 2025 season at the Big Marsh bird banding station.

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ConservationRobyn DetterlineFebruary 7, 2026Big Marsh, calumet
Field Trip Recap:  Waterfowl Watch
Field Trip Recap: Waterfowl Watch

COS member Steve Whitman recaps the Waterfowl Walk, activity zone and presentation at Northerly Island on Jan. 10, 2026.

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Field TripKris HansenJanuary 16, 2026
Field Trip Recap:  Cranberry Slough
Field Trip Recap: Cranberry Slough

COS member Joann Umeki recaps the bird walk at Cranberry Slough on Jan. 4, 2026.

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Field TripKris HansenJanuary 9, 2026Cranberry Slough
Field Trip Recap: Owl Prowls
Field Trip Recap: Owl Prowls

COS member Lauren Kostas recaps the Owl Prowls at North Park Village Nature Center in November and December.

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Field TripKris HansenJanuary 3, 2026North Park Village
Field trip recap: Owl Prowl at Marian Byrnes Park
Field trip recap: Owl Prowl at Marian Byrnes Park

COS member Steve Whitman recaps the owl prowl at Marian R. Byrnes Park.

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Field TripKris HansenDecember 21, 2025Marian Byrnes, calumet
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