Birding spot · Jefferson County, Colorado
Birding at Chatfield State Park: What You'll See Each Week In November, the birds most often reported at Chatfield State Park are Mallard (78%), American Coot (77%), and Ring-billed Gull (77%). It is busiest in summer, when 68 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of August (85 species). 220 species have been reported here across 1,905 complete checklists from 575 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 37 species on 5%+ of 52 checklists Jan 8-14: 31 species on 5%+ of 63 checklists Jan 15-21: 33 species on 5%+ of 25 checklists Jan 22-31: low data (7 checklists) Feb 1-7: low data (7 checklists) Feb 8-14: low data (4 checklists) Feb 15-21: low data (4 checklists) Feb 22-28: 38 species on 5%+ of 17 checklists Mar 1-7: 27 species on 5%+ of 23 checklists Mar 8-14: low data (9 checklists) Mar 15-21: 49 species on 5%+ of 26 checklists Mar 22-31: 41 species on 5%+ of 41 checklists Apr 1-7: 57 species on 5%+ of 36 checklists Apr 8-14: 59 species on 5%+ of 39 checklists Apr 15-21: 67 species on 5%+ of 96 checklists Apr 22-30: 66 species on 5%+ of 96 checklists May 1-7: 61 species on 5%+ of 64 checklists May 8-14: 62 species on 5%+ of 41 checklists May 15-21: 77 species on 5%+ of 16 checklists May 22-31: 59 species on 5%+ of 28 checklists Jun 1-7: 74 species on 5%+ of 29 checklists Jun 8-14: 70 species on 5%+ of 13 checklists Jun 15-21: 80 species on 5%+ of 14 checklists Jun 22-30: 63 species on 5%+ of 17 checklists Jul 1-7: 63 species on 5%+ of 12 checklists Jul 8-14: 60 species on 5%+ of 34 checklists Jul 15-21: 63 species on 5%+ of 29 checklists Jul 22-31: 54 species on 5%+ of 23 checklists Aug 1-7: 66 species on 5%+ of 19 checklists Aug 8-14: 85 species on 5%+ of 20 checklists Aug 15-21: 64 species on 5%+ of 46 checklists Aug 22-31: 61 species on 5%+ of 114 checklists Sep 1-7: 72 species on 5%+ of 98 checklists Sep 8-14: 76 species on 5%+ of 84 checklists Sep 15-21: 61 species on 5%+ of 73 checklists Sep 22-30: 68 species on 5%+ of 79 checklists Oct 1-7: 56 species on 5%+ of 51 checklists Oct 8-14: 67 species on 5%+ of 46 checklists Oct 15-21: 46 species on 5%+ of 41 checklists Oct 22-31: 53 species on 5%+ of 66 checklists Nov 1-7: 49 species on 5%+ of 67 checklists Nov 8-14: 55 species on 5%+ of 54 checklists Nov 15-21: 46 species on 5%+ of 28 checklists Nov 22-30: 43 species on 5%+ of 49 checklists Dec 1-7: 43 species on 5%+ of 44 checklists Dec 8-14: 47 species on 5%+ of 18 checklists Dec 15-21: 42 species on 5%+ of 13 checklists Dec 22-31: 39 species on 5%+ of 30 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 78% 2 American Coot 77% 3 Ring-billed Gull 77% 4 Canada Goose 75% 5 Black-billed Magpie 60% 6 Northern Flicker 45% 7 Gadwall 42% 8 American Crow 41% 9 American Wigeon 41% 10 Northern Shoveler 36% 11 Bald Eagle 35% 12 Black-capped Chickadee 35% 13 Bufflehead 35% 14 Red-tailed Hawk 34% 15 Killdeer 34% 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 .
Mallard78%
American Coot77%
Ring-billed Gull77%
Canada Goose75%
Black-billed Magpie60%
Northern Flicker45%
Gadwall42%
American Crow41%
American Wigeon41%
Northern Shoveler36%
Bald Eagle35%
Black-capped Chickadee35%
Bufflehead35%
Red-tailed Hawk34%
Killdeer34%