Birding spot · Weld County, Colorado
Birding at Calkins Lake: What You'll See Each Week In November, the birds most often reported at Calkins Lake are Ring-billed Gull (92%), Bonaparte's Gull (83%), and Western Grebe (77%). It is busiest in spring, when 84 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of May (90 species). 211 species have been reported here across 2,363 complete checklists from 553 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 48 species on 5%+ of 36 checklists Jan 8-14: 52 species on 5%+ of 19 checklists Jan 15-21: 40 species on 5%+ of 18 checklists Jan 22-31: 37 species on 5%+ of 23 checklists Feb 1-7: 42 species on 5%+ of 17 checklists Feb 8-14: low data (7 checklists) Feb 15-21: 34 species on 5%+ of 11 checklists Feb 22-28: 55 species on 5%+ of 19 checklists Mar 1-7: 51 species on 5%+ of 30 checklists Mar 8-14: 48 species on 5%+ of 39 checklists Mar 15-21: 51 species on 5%+ of 41 checklists Mar 22-31: 61 species on 5%+ of 102 checklists Apr 1-7: 67 species on 5%+ of 77 checklists Apr 8-14: 64 species on 5%+ of 70 checklists Apr 15-21: 71 species on 5%+ of 77 checklists Apr 22-30: 84 species on 5%+ of 134 checklists May 1-7: 86 species on 5%+ of 92 checklists May 8-14: 90 species on 5%+ of 74 checklists May 15-21: 84 species on 5%+ of 53 checklists May 22-31: 84 species on 5%+ of 60 checklists Jun 1-7: 72 species on 5%+ of 38 checklists Jun 8-14: 56 species on 5%+ of 25 checklists Jun 15-21: 60 species on 5%+ of 15 checklists Jun 22-30: 49 species on 5%+ of 33 checklists Jul 1-7: 57 species on 5%+ of 19 checklists Jul 8-14: 42 species on 5%+ of 27 checklists Jul 15-21: 62 species on 5%+ of 17 checklists Jul 22-31: 54 species on 5%+ of 20 checklists Aug 1-7: 71 species on 5%+ of 16 checklists Aug 8-14: 58 species on 5%+ of 27 checklists Aug 15-21: 73 species on 5%+ of 33 checklists Aug 22-31: 60 species on 5%+ of 50 checklists Sep 1-7: 68 species on 5%+ of 36 checklists Sep 8-14: 68 species on 5%+ of 36 checklists Sep 15-21: 64 species on 5%+ of 61 checklists Sep 22-30: 67 species on 5%+ of 72 checklists Oct 1-7: 70 species on 5%+ of 57 checklists Oct 8-14: 72 species on 5%+ of 50 checklists Oct 15-21: 61 species on 5%+ of 76 checklists Oct 22-31: 65 species on 5%+ of 89 checklists Nov 1-7: 67 species on 5%+ of 51 checklists Nov 8-14: 68 species on 5%+ of 80 checklists Nov 15-21: 69 species on 5%+ of 75 checklists Nov 22-30: 66 species on 5%+ of 95 checklists Dec 1-7: 65 species on 5%+ of 90 checklists Dec 8-14: 60 species on 5%+ of 70 checklists Dec 15-21: 53 species on 5%+ of 47 checklists Dec 22-31: 54 species on 5%+ of 59 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 92% 2 Bonaparte's Gull 83% 3 Western Grebe 77% 4 Common Goldeneye 73% 5 Common Merganser 69% 6 Canada Goose 69% 7 Eared Grebe 67% 8 Mallard 63% 9 American White Pelican 63% 10 Red-winged Blackbird 60% 11 Cackling Goose 58% 12 Red-tailed Hawk 56% 13 European Starling 53% 14 American Coot 52% 15 Horned Grebe 51% 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 Gull92%
Bonaparte's Gull83%
Western Grebe77%
Common Goldeneye73%
Common Merganser69%
Canada Goose69%
Eared Grebe67%
Mallard63%
American White Pelican63%
Red-winged Blackbird60%
Cackling Goose58%
Red-tailed Hawk56%
European Starling53%
American Coot52%
Horned Grebe51%