Birding spot · Boulder County, Colorado
Birding at McIntosh Lake: What You'll See Each Week In November, the birds most often reported at McIntosh Lake are Ring-billed Gull (82%), Canada Goose (60%), and Mallard (57%). It is busiest in spring, when 65 species turn up on at least 1 in 20 checklists, and species counts peak in late April (72 species). 166 species have been reported here across 1,415 complete checklists from 322 birders.
Species by week 0 20 40 60 80 Jan 1-7: 43 species on 5%+ of 32 checklists Jan 8-14: 38 species on 5%+ of 15 checklists Jan 15-21: 41 species on 5%+ of 39 checklists Jan 22-31: 46 species on 5%+ of 31 checklists Feb 1-7: 37 species on 5%+ of 32 checklists Feb 8-14: 46 species on 5%+ of 18 checklists Feb 15-21: 32 species on 5%+ of 21 checklists Feb 22-28: 41 species on 5%+ of 18 checklists Mar 1-7: low data (8 checklists) Mar 8-14: 48 species on 5%+ of 12 checklists Mar 15-21: 55 species on 5%+ of 17 checklists Mar 22-31: 48 species on 5%+ of 34 checklists Apr 1-7: 49 species on 5%+ of 27 checklists Apr 8-14: 60 species on 5%+ of 35 checklists Apr 15-21: 58 species on 5%+ of 45 checklists Apr 22-30: 72 species on 5%+ of 58 checklists May 1-7: 68 species on 5%+ of 37 checklists May 8-14: 67 species on 5%+ of 38 checklists May 15-21: 56 species on 5%+ of 27 checklists May 22-31: 50 species on 5%+ of 27 checklists Jun 1-7: 52 species on 5%+ of 14 checklists Jun 8-14: 51 species on 5%+ of 19 checklists Jun 15-21: 43 species on 5%+ of 24 checklists Jun 22-30: 45 species on 5%+ of 22 checklists Jul 1-7: 57 species on 5%+ of 20 checklists Jul 8-14: 49 species on 5%+ of 14 checklists Jul 15-21: 47 species on 5%+ of 24 checklists Jul 22-31: 49 species on 5%+ of 33 checklists Aug 1-7: 50 species on 5%+ of 23 checklists Aug 8-14: 40 species on 5%+ of 23 checklists Aug 15-21: 36 species on 5%+ of 21 checklists Aug 22-31: 42 species on 5%+ of 54 checklists Sep 1-7: 61 species on 5%+ of 19 checklists Sep 8-14: 43 species on 5%+ of 30 checklists Sep 15-21: 38 species on 5%+ of 22 checklists Sep 22-30: 66 species on 5%+ of 40 checklists Oct 1-7: 55 species on 5%+ of 20 checklists Oct 8-14: 41 species on 5%+ of 21 checklists Oct 15-21: 50 species on 5%+ of 27 checklists Oct 22-31: 59 species on 5%+ of 44 checklists Nov 1-7: 53 species on 5%+ of 46 checklists Nov 8-14: 56 species on 5%+ of 43 checklists Nov 15-21: 47 species on 5%+ of 25 checklists Nov 22-30: 52 species on 5%+ of 87 checklists Dec 1-7: 50 species on 5%+ of 37 checklists Dec 8-14: 44 species on 5%+ of 40 checklists Dec 15-21: 48 species on 5%+ of 20 checklists Dec 22-31: 37 species on 5%+ of 32 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 Ring-billed Gull 82% 2 Canada Goose 60% 3 Mallard 57% 4 Western Grebe 48% 5 Common Merganser 44% 6 Northern Flicker 44% 7 Red-winged Blackbird 43% 8 American Crow 43% 9 American White Pelican 41% 10 Common Goldeneye 41% 11 House Finch 40% 12 Blue Jay 39% 13 Great Blue Heron 38% 14 Cackling Goose 38% 15 European Starling 32% 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 Colorado.
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 .
Ring-billed Gull82%
Canada Goose60%
Mallard57%
Western Grebe48%
Common Merganser44%
Northern Flicker44%
Red-winged Blackbird43%
American Crow43%
American White Pelican41%
Common Goldeneye41%
House Finch40%
Blue Jay39%
Great Blue Heron38%
Cackling Goose38%
European Starling32%