Birding spot · Denver County, Colorado
Birding at Bluff Lake: What You'll See Each Week In November, the birds most often reported at Bluff Lake are Mallard (83%), Canada Goose (81%), and Black-billed Magpie (78%). It is busiest in spring, when 73 species turn up on at least 1 in 20 checklists, and species counts peak in early May (75 species). 194 species have been reported here across 4,827 complete checklists from 1,228 birders.
Species by week 0 20 40 60 80 Jan 1-7: 41 species on 5%+ of 110 checklists Jan 8-14: 40 species on 5%+ of 56 checklists Jan 15-21: 37 species on 5%+ of 68 checklists Jan 22-31: 38 species on 5%+ of 89 checklists Feb 1-7: 45 species on 5%+ of 70 checklists Feb 8-14: 43 species on 5%+ of 71 checklists Feb 15-21: 43 species on 5%+ of 68 checklists Feb 22-28: 44 species on 5%+ of 78 checklists Mar 1-7: 45 species on 5%+ of 115 checklists Mar 8-14: 48 species on 5%+ of 87 checklists Mar 15-21: 49 species on 5%+ of 106 checklists Mar 22-31: 50 species on 5%+ of 152 checklists Apr 1-7: 56 species on 5%+ of 158 checklists Apr 8-14: 58 species on 5%+ of 128 checklists Apr 15-21: 66 species on 5%+ of 119 checklists Apr 22-30: 64 species on 5%+ of 190 checklists May 1-7: 75 species on 5%+ of 162 checklists May 8-14: 70 species on 5%+ of 128 checklists May 15-21: 75 species on 5%+ of 159 checklists May 22-31: 71 species on 5%+ of 140 checklists Jun 1-7: 65 species on 5%+ of 110 checklists Jun 8-14: 56 species on 5%+ of 88 checklists Jun 15-21: 53 species on 5%+ of 53 checklists Jun 22-30: 55 species on 5%+ of 70 checklists Jul 1-7: 61 species on 5%+ of 88 checklists Jul 8-14: 57 species on 5%+ of 63 checklists Jul 15-21: 60 species on 5%+ of 52 checklists Jul 22-31: 59 species on 5%+ of 94 checklists Aug 1-7: 65 species on 5%+ of 93 checklists Aug 8-14: 56 species on 5%+ of 77 checklists Aug 15-21: 51 species on 5%+ of 68 checklists Aug 22-31: 64 species on 5%+ of 113 checklists Sep 1-7: 60 species on 5%+ of 110 checklists Sep 8-14: 60 species on 5%+ of 96 checklists Sep 15-21: 61 species on 5%+ of 119 checklists Sep 22-30: 57 species on 5%+ of 143 checklists Oct 1-7: 54 species on 5%+ of 147 checklists Oct 8-14: 56 species on 5%+ of 78 checklists Oct 15-21: 44 species on 5%+ of 121 checklists Oct 22-31: 46 species on 5%+ of 95 checklists Nov 1-7: 45 species on 5%+ of 101 checklists Nov 8-14: 47 species on 5%+ of 120 checklists Nov 15-21: 46 species on 5%+ of 97 checklists Nov 22-30: 42 species on 5%+ of 88 checklists Dec 1-7: 47 species on 5%+ of 79 checklists Dec 8-14: 43 species on 5%+ of 53 checklists Dec 15-21: 42 species on 5%+ of 57 checklists Dec 22-31: 37 species on 5%+ of 100 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 83% 2 Canada Goose 81% 3 Black-billed Magpie 78% 4 White-crowned Sparrow 78% 5 Gadwall 70% 6 American Wigeon 68% 7 Red-winged Blackbird 63% 8 American Crow 62% 9 Northern Flicker 55% 10 Black-capped Chickadee 52% 11 American Coot 50% 12 House Finch 48% 13 Red-tailed Hawk 47% 14 Ring-necked Duck 44% 15 Song Sparrow 42% 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 .
Mallard83%
Canada Goose81%
Black-billed Magpie78%
White-crowned Sparrow78%
Gadwall70%
American Wigeon68%
Red-winged Blackbird63%
American Crow62%
Northern Flicker55%
Black-capped Chickadee52%
American Coot50%
House Finch48%
Red-tailed Hawk47%
Ring-necked Duck44%
Song Sparrow42%