Birding spot · Jefferson County, Colorado
Birding at Harriman Lake: What You'll See Each Week In November, the birds most often reported at Harriman Lake are American Coot (94%), Mallard (83%), and Canada Goose (78%). It is busiest in spring, when 73 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of May (83 species). 197 species have been reported here across 3,241 complete checklists from 544 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 39 species on 5%+ of 39 checklists Jan 8-14: 32 species on 5%+ of 26 checklists Jan 15-21: 35 species on 5%+ of 41 checklists Jan 22-31: 36 species on 5%+ of 48 checklists Feb 1-7: 44 species on 5%+ of 37 checklists Feb 8-14: 38 species on 5%+ of 29 checklists Feb 15-21: 36 species on 5%+ of 24 checklists Feb 22-28: 37 species on 5%+ of 32 checklists Mar 1-7: 39 species on 5%+ of 40 checklists Mar 8-14: 42 species on 5%+ of 52 checklists Mar 15-21: 46 species on 5%+ of 54 checklists Mar 22-31: 48 species on 5%+ of 117 checklists Apr 1-7: 55 species on 5%+ of 98 checklists Apr 8-14: 53 species on 5%+ of 101 checklists Apr 15-21: 68 species on 5%+ of 109 checklists Apr 22-30: 70 species on 5%+ of 249 checklists May 1-7: 72 species on 5%+ of 206 checklists May 8-14: 83 species on 5%+ of 191 checklists May 15-21: 82 species on 5%+ of 84 checklists May 22-31: 67 species on 5%+ of 130 checklists Jun 1-7: 54 species on 5%+ of 50 checklists Jun 8-14: 50 species on 5%+ of 35 checklists Jun 15-21: 56 species on 5%+ of 36 checklists Jun 22-30: 52 species on 5%+ of 57 checklists Jul 1-7: 50 species on 5%+ of 38 checklists Jul 8-14: 50 species on 5%+ of 29 checklists Jul 15-21: 53 species on 5%+ of 36 checklists Jul 22-31: 40 species on 5%+ of 50 checklists Aug 1-7: 43 species on 5%+ of 39 checklists Aug 8-14: 45 species on 5%+ of 48 checklists Aug 15-21: 52 species on 5%+ of 49 checklists Aug 22-31: 55 species on 5%+ of 63 checklists Sep 1-7: 52 species on 5%+ of 61 checklists Sep 8-14: 75 species on 5%+ of 97 checklists Sep 15-21: 54 species on 5%+ of 46 checklists Sep 22-30: 54 species on 5%+ of 56 checklists Oct 1-7: 53 species on 5%+ of 54 checklists Oct 8-14: 48 species on 5%+ of 67 checklists Oct 15-21: 47 species on 5%+ of 109 checklists Oct 22-31: 41 species on 5%+ of 72 checklists Nov 1-7: 45 species on 5%+ of 87 checklists Nov 8-14: 43 species on 5%+ of 72 checklists Nov 15-21: 49 species on 5%+ of 53 checklists Nov 22-30: 40 species on 5%+ of 61 checklists Dec 1-7: 38 species on 5%+ of 52 checklists Dec 8-14: 37 species on 5%+ of 33 checklists Dec 15-21: 34 species on 5%+ of 31 checklists Dec 22-31: 36 species on 5%+ of 53 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 American Coot 94% 2 Mallard 83% 3 Canada Goose 78% 4 Red-winged Blackbird 73% 5 American Wigeon 68% 6 Pied-billed Grebe 66% 7 Ring-billed Gull 64% 8 Bufflehead 60% 9 Black-billed Magpie 56% 10 Northern Flicker 55% 11 Gadwall 54% 12 Hooded Merganser 49% 13 American Crow 48% 14 Redhead 47% 15 Northern Shoveler 44% 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 .
American Coot94%
Mallard83%
Canada Goose78%
Red-winged Blackbird73%
American Wigeon68%
Pied-billed Grebe66%
Ring-billed Gull64%
Bufflehead60%
Black-billed Magpie56%
Northern Flicker55%
Gadwall54%
Hooded Merganser49%
American Crow48%
Redhead47%
Northern Shoveler44%