Birding spot · Boulder County, Colorado
Birding at Varsity Lake: What You'll See Each Week In November, the birds most often reported at Varsity Lake are Black-capped Chickadee (66%), Northern Flicker (56%), and House Finch (52%). It is busiest in spring, when 35 species turn up on at least 1 in 20 checklists, and species counts peak in late May (59 species). 119 species have been reported here across 1,883 complete checklists from 277 birders.
Species by week 0 20 40 60 Jan 1-7: low data (9 checklists) Jan 8-14: 33 species on 5%+ of 20 checklists Jan 15-21: 25 species on 5%+ of 46 checklists Jan 22-31: 21 species on 5%+ of 82 checklists Feb 1-7: 26 species on 5%+ of 49 checklists Feb 8-14: 17 species on 5%+ of 42 checklists Feb 15-21: 18 species on 5%+ of 45 checklists Feb 22-28: 18 species on 5%+ of 45 checklists Mar 1-7: 23 species on 5%+ of 54 checklists Mar 8-14: 23 species on 5%+ of 49 checklists Mar 15-21: 23 species on 5%+ of 52 checklists Mar 22-31: 34 species on 5%+ of 18 checklists Apr 1-7: 24 species on 5%+ of 38 checklists Apr 8-14: 26 species on 5%+ of 43 checklists Apr 15-21: 40 species on 5%+ of 96 checklists Apr 22-30: 36 species on 5%+ of 80 checklists May 1-7: 38 species on 5%+ of 49 checklists May 8-14: 51 species on 5%+ of 32 checklists May 15-21: 41 species on 5%+ of 22 checklists May 22-31: 59 species on 5%+ of 50 checklists Jun 1-7: low data (8 checklists) Jun 8-14: low data (9 checklists) Jun 15-21: low data (5 checklists) Jun 22-30: low data (8 checklists) Jul 1-7: low data (2 checklists) Jul 8-14: low data (5 checklists) Jul 15-21: low data (7 checklists) Jul 22-31: low data (7 checklists) Aug 1-7: low data (5 checklists) Aug 8-14: low data (3 checklists) Aug 15-21: low data (7 checklists) Aug 22-31: 22 species on 5%+ of 63 checklists Sep 1-7: 20 species on 5%+ of 42 checklists Sep 8-14: 21 species on 5%+ of 46 checklists Sep 15-21: 23 species on 5%+ of 64 checklists Sep 22-30: 28 species on 5%+ of 77 checklists Oct 1-7: 21 species on 5%+ of 43 checklists Oct 8-14: 17 species on 5%+ of 43 checklists Oct 15-21: 23 species on 5%+ of 69 checklists Oct 22-31: 19 species on 5%+ of 87 checklists Nov 1-7: 20 species on 5%+ of 47 checklists Nov 8-14: 25 species on 5%+ of 46 checklists Nov 15-21: 33 species on 5%+ of 87 checklists Nov 22-30: 34 species on 5%+ of 54 checklists Dec 1-7: 27 species on 5%+ of 53 checklists Dec 8-14: 26 species on 5%+ of 46 checklists Dec 15-21: 36 species on 5%+ of 19 checklists Dec 22-31: 33 species on 5%+ of 10 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 Black-capped Chickadee 66% 2 Northern Flicker 56% 3 House Finch 52% 4 Common Raven 47% 5 American Crow 47% 6 Dark-eyed Junco 42% 7 American Robin 39% 8 Mallard 38% 9 White-breasted Nuthatch 38% 10 Downy Woodpecker 37% 11 Ruby-crowned Kinglet 34% 12 Blue Jay 27% 13 Northern Parula 24% 14 Rock Pigeon 24% 15 American Dipper 23% 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 .
Black-capped Chickadee66%
Northern Flicker56%
House Finch52%
Common Raven47%
American Crow47%
Dark-eyed Junco42%
American Robin39%
Mallard38%
White-breasted Nuthatch38%
Downy Woodpecker37%
Ruby-crowned Kinglet34%
Blue Jay27%
Northern Parula24%
Rock Pigeon24%
American Dipper23%