Birding spot · Broomfield County, Colorado
Birding at Plaster Reservoir: What You'll See Each Week In November, the birds most often reported at Plaster Reservoir are Ring-billed Gull (94%), Bufflehead (88%), and American Coot (86%). It is busiest in spring, when 82 species turn up on at least 1 in 20 checklists, and species counts peak in mid May (87 species). 191 species have been reported here across 2,987 complete checklists from 410 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 46 species on 5%+ of 36 checklists Jan 8-14: 38 species on 5%+ of 27 checklists Jan 15-21: 45 species on 5%+ of 28 checklists Jan 22-31: 42 species on 5%+ of 41 checklists Feb 1-7: 44 species on 5%+ of 41 checklists Feb 8-14: 45 species on 5%+ of 34 checklists Feb 15-21: 47 species on 5%+ of 34 checklists Feb 22-28: 51 species on 5%+ of 58 checklists Mar 1-7: 54 species on 5%+ of 54 checklists Mar 8-14: 50 species on 5%+ of 73 checklists Mar 15-21: 55 species on 5%+ of 64 checklists Mar 22-31: 58 species on 5%+ of 93 checklists Apr 1-7: 68 species on 5%+ of 128 checklists Apr 8-14: 69 species on 5%+ of 96 checklists Apr 15-21: 70 species on 5%+ of 82 checklists Apr 22-30: 78 species on 5%+ of 118 checklists May 1-7: 76 species on 5%+ of 87 checklists May 8-14: 83 species on 5%+ of 111 checklists May 15-21: 87 species on 5%+ of 97 checklists May 22-31: 76 species on 5%+ of 98 checklists Jun 1-7: 65 species on 5%+ of 33 checklists Jun 8-14: 65 species on 5%+ of 31 checklists Jun 15-21: 58 species on 5%+ of 25 checklists Jun 22-30: 54 species on 5%+ of 28 checklists Jul 1-7: 59 species on 5%+ of 18 checklists Jul 8-14: 52 species on 5%+ of 24 checklists Jul 15-21: 58 species on 5%+ of 39 checklists Jul 22-31: 64 species on 5%+ of 40 checklists Aug 1-7: 60 species on 5%+ of 33 checklists Aug 8-14: 69 species on 5%+ of 52 checklists Aug 15-21: 63 species on 5%+ of 46 checklists Aug 22-31: 81 species on 5%+ of 99 checklists Sep 1-7: 75 species on 5%+ of 91 checklists Sep 8-14: 78 species on 5%+ of 75 checklists Sep 15-21: 73 species on 5%+ of 82 checklists Sep 22-30: 72 species on 5%+ of 113 checklists Oct 1-7: 71 species on 5%+ of 71 checklists Oct 8-14: 70 species on 5%+ of 78 checklists Oct 15-21: 64 species on 5%+ of 72 checklists Oct 22-31: 64 species on 5%+ of 97 checklists Nov 1-7: 62 species on 5%+ of 71 checklists Nov 8-14: 49 species on 5%+ of 48 checklists Nov 15-21: 53 species on 5%+ of 62 checklists Nov 22-30: 56 species on 5%+ of 67 checklists Dec 1-7: 53 species on 5%+ of 41 checklists Dec 8-14: 51 species on 5%+ of 47 checklists Dec 15-21: 46 species on 5%+ of 44 checklists Dec 22-31: 49 species on 5%+ of 60 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 94% 2 Bufflehead 88% 3 American Coot 86% 4 Mallard 83% 5 Ring-necked Duck 81% 6 Red-winged Blackbird 81% 7 Canada Goose 80% 8 American Wigeon 77% 9 Black-capped Chickadee 72% 10 House Finch 71% 11 Gadwall 71% 12 Northern Flicker 66% 13 Song Sparrow 66% 14 American Goldfinch 64% 15 Blue Jay 64% 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 Gull94%
Bufflehead88%
American Coot86%
Mallard83%
Ring-necked Duck81%
Red-winged Blackbird81%
Canada Goose80%
American Wigeon77%
Black-capped Chickadee72%
House Finch71%
Gadwall71%
Northern Flicker66%
Song Sparrow66%
American Goldfinch64%
Blue Jay64%