COS Blog

COS board member Robyn Detterline recaps the Sunday Social Bird Walk at Humboldt Park on Aug. 23.

Trip co-leader Chris Holden recaps the Sunday Social Bird Walk at Humboldt Park on Aug. 9, 2026.

COS board member and trip leader Chris Holden recaps the Sunday Social Bird Walk at Humboldt Park on April 19.

COS board member and trip leader recaps the Sunday Social at Humboldt Park on Nov. 2, 2025.