Birding spot · Cook County, Illinois
Birding at Chicago Harbor: What You'll See Each Week In November, the birds most often reported at Chicago Harbor are Canada Goose (88%), Ring-billed Gull (79%), and American Herring Gull (64%). It is busiest in summer, when 34 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of May (53 species). 119 species have been reported here across 885 complete checklists from 352 birders.
Species by week 0 20 40 60 Jan 1-7: 23 species on 5%+ of 41 checklists Jan 8-14: 27 species on 5%+ of 45 checklists Jan 15-21: 26 species on 5%+ of 33 checklists Jan 22-31: 23 species on 5%+ of 73 checklists Feb 1-7: 30 species on 5%+ of 35 checklists Feb 8-14: 26 species on 5%+ of 32 checklists Feb 15-21: 30 species on 5%+ of 20 checklists Feb 22-28: 30 species on 5%+ of 13 checklists Mar 1-7: 19 species on 5%+ of 30 checklists Mar 8-14: 28 species on 5%+ of 43 checklists Mar 15-21: 28 species on 5%+ of 36 checklists Mar 22-31: 29 species on 5%+ of 33 checklists Apr 1-7: 40 species on 5%+ of 18 checklists Apr 8-14: 32 species on 5%+ of 12 checklists Apr 15-21: 38 species on 5%+ of 29 checklists Apr 22-30: 46 species on 5%+ of 28 checklists May 1-7: low data (8 checklists) May 8-14: 53 species on 5%+ of 10 checklists May 15-21: low data (4 checklists) May 22-31: low data (8 checklists) Jun 1-7: low data (5 checklists) Jun 8-14: 29 species on 5%+ of 10 checklists Jun 15-21: low data (5 checklists) Jun 22-30: low data (8 checklists) Jul 1-7: low data (4 checklists) Jul 8-14: low data (5 checklists) Jul 15-21: low data (5 checklists) Jul 22-31: low data (8 checklists) Aug 1-7: low data (5 checklists) Aug 8-14: low data (6 checklists) Aug 15-21: low data (3 checklists) Aug 22-31: 36 species on 5%+ of 13 checklists Sep 1-7: low data (8 checklists) Sep 8-14: low data (3 checklists) Sep 15-21: low data (5 checklists) Sep 22-30: low data (4 checklists) Oct 1-7: 27 species on 5%+ of 10 checklists Oct 8-14: low data (5 checklists) Oct 15-21: 34 species on 5%+ of 13 checklists Oct 22-31: 26 species on 5%+ of 14 checklists Nov 1-7: 26 species on 5%+ of 43 checklists Nov 8-14: 26 species on 5%+ of 10 checklists Nov 15-21: 26 species on 5%+ of 23 checklists Nov 22-30: 20 species on 5%+ of 21 checklists Dec 1-7: 27 species on 5%+ of 22 checklists Dec 8-14: 38 species on 5%+ of 17 checklists Dec 15-21: 27 species on 5%+ of 25 checklists Dec 22-31: 28 species on 5%+ of 34 checklists Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Number of species reported on at least 5% of complete checklists, by week (4 per month). Grey bars: fewer than 10 checklists, not counted. In November: what to expect 1 Canada Goose 88% 2 Ring-billed Gull 79% 3 American Herring Gull 64% 4 Red-breasted Merganser 57% 5 American Crow 42% 6 Double-crested Cormorant 39% 7 Horned Grebe 36% 8 White-throated Sparrow 31% 9 American Coot 28% 10 King Eider 28% 11 Mallard 27% 12 Black-capped Chickadee 23% 13 Dark-eyed Junco 23% 14 American Robin 19% 15 House Sparrow 19% Share of complete checklists at this spot that reported the bird in November. The sparkline is the whole year, with this month highlighted.
Season by season Specialties Birds reported far more often here than across Illinois.
Nearby spots Frequency is the share of complete checklists at this location that listed the bird, 2016–2025. Busy places report more of everything, and the weekly chart counts species on at least 5% of checklists so a few stray reports do not inflate it. How to read it .
Canada Goose88%
Ring-billed Gull79%
American Herring Gull64%
Red-breasted Merganser57%
American Crow42%
Double-crested Cormorant39%
Horned Grebe36%
White-throated Sparrow31%
American Coot28%
King Eider28%
Mallard27%
Black-capped Chickadee23%
Dark-eyed Junco23%
American Robin19%
House Sparrow19%