Birding spot · Cook County, Illinois
Birding at River: What You'll See Each Week In November, the birds most often reported at River are Mallard (91%), Dark-eyed Junco (72%), and American Robin (59%). It is busiest in spring, when 68 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of May (85 species). 165 species have been reported here across 2,009 complete checklists from 354 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 32 species on 5%+ of 56 checklists Jan 8-14: 28 species on 5%+ of 47 checklists Jan 15-21: 32 species on 5%+ of 55 checklists Jan 22-31: 35 species on 5%+ of 50 checklists Feb 1-7: 36 species on 5%+ of 62 checklists Feb 8-14: 34 species on 5%+ of 58 checklists Feb 15-21: 36 species on 5%+ of 56 checklists Feb 22-28: 35 species on 5%+ of 48 checklists Mar 1-7: 39 species on 5%+ of 39 checklists Mar 8-14: 33 species on 5%+ of 41 checklists Mar 15-21: 32 species on 5%+ of 27 checklists Mar 22-31: 44 species on 5%+ of 47 checklists Apr 1-7: 43 species on 5%+ of 80 checklists Apr 8-14: 49 species on 5%+ of 43 checklists Apr 15-21: 50 species on 5%+ of 58 checklists Apr 22-30: 61 species on 5%+ of 65 checklists May 1-7: 74 species on 5%+ of 80 checklists May 8-14: 85 species on 5%+ of 72 checklists May 15-21: 74 species on 5%+ of 126 checklists May 22-31: 60 species on 5%+ of 91 checklists Jun 1-7: 45 species on 5%+ of 49 checklists Jun 8-14: 45 species on 5%+ of 27 checklists Jun 15-21: 51 species on 5%+ of 29 checklists Jun 22-30: 39 species on 5%+ of 21 checklists Jul 1-7: 40 species on 5%+ of 17 checklists Jul 8-14: 38 species on 5%+ of 21 checklists Jul 15-21: 29 species on 5%+ of 10 checklists Jul 22-31: 38 species on 5%+ of 27 checklists Aug 1-7: 54 species on 5%+ of 20 checklists Aug 8-14: 46 species on 5%+ of 17 checklists Aug 15-21: 49 species on 5%+ of 15 checklists Aug 22-31: 44 species on 5%+ of 39 checklists Sep 1-7: 50 species on 5%+ of 37 checklists Sep 8-14: 41 species on 5%+ of 24 checklists Sep 15-21: 44 species on 5%+ of 35 checklists Sep 22-30: 61 species on 5%+ of 50 checklists Oct 1-7: 55 species on 5%+ of 43 checklists Oct 8-14: 48 species on 5%+ of 36 checklists Oct 15-21: 48 species on 5%+ of 28 checklists Oct 22-31: 48 species on 5%+ of 37 checklists Nov 1-7: 34 species on 5%+ of 31 checklists Nov 8-14: 37 species on 5%+ of 34 checklists Nov 15-21: 39 species on 5%+ of 17 checklists Nov 22-30: 31 species on 5%+ of 21 checklists Dec 1-7: 38 species on 5%+ of 17 checklists Dec 8-14: 41 species on 5%+ of 19 checklists Dec 15-21: 35 species on 5%+ of 41 checklists Dec 22-31: 34 species on 5%+ of 46 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 Mallard 91% 2 Dark-eyed Junco 72% 3 American Robin 59% 4 American Goldfinch 50% 5 Canada Goose 49% 6 House Sparrow 48% 7 Northern Cardinal 41% 8 Belted Kingfisher 40% 9 Rock Pigeon 35% 10 Downy Woodpecker 32% 11 Great Blue Heron 32% 12 American Crow 31% 13 White-throated Sparrow 31% 14 American Herring Gull 29% 15 Ring-billed Gull 27% 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 .
Mallard91%
Dark-eyed Junco72%
American Robin59%
American Goldfinch50%
Canada Goose49%
House Sparrow48%
Northern Cardinal41%
Belted Kingfisher40%
Rock Pigeon35%
Downy Woodpecker32%
Great Blue Heron32%
American Crow31%
White-throated Sparrow31%
American Herring Gull29%
Ring-billed Gull27%