Birding spot · Waukesha County, Wisconsin
Birding at Retzer Nature Center: What You'll See Each Week In November, the birds most often reported at Retzer Nature Center are Black-capped Chickadee (97%), American Crow (92%), and Dark-eyed Junco (92%). It is busiest in spring, when 87 species turn up on at least 1 in 20 checklists, and species counts peak in mid May (95 species). 161 species have been reported here across 1,678 complete checklists from 391 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 27 species on 5%+ of 33 checklists Jan 8-14: 31 species on 5%+ of 32 checklists Jan 15-21: 25 species on 5%+ of 28 checklists Jan 22-31: 24 species on 5%+ of 24 checklists Feb 1-7: 30 species on 5%+ of 23 checklists Feb 8-14: 26 species on 5%+ of 25 checklists Feb 15-21: 31 species on 5%+ of 17 checklists Feb 22-28: 32 species on 5%+ of 17 checklists Mar 1-7: 31 species on 5%+ of 24 checklists Mar 8-14: 42 species on 5%+ of 20 checklists Mar 15-21: 46 species on 5%+ of 20 checklists Mar 22-31: 49 species on 5%+ of 39 checklists Apr 1-7: 48 species on 5%+ of 59 checklists Apr 8-14: 55 species on 5%+ of 66 checklists Apr 15-21: 61 species on 5%+ of 56 checklists Apr 22-30: 68 species on 5%+ of 91 checklists May 1-7: 78 species on 5%+ of 97 checklists May 8-14: 87 species on 5%+ of 83 checklists May 15-21: 95 species on 5%+ of 83 checklists May 22-31: 89 species on 5%+ of 77 checklists Jun 1-7: 69 species on 5%+ of 52 checklists Jun 8-14: 66 species on 5%+ of 50 checklists Jun 15-21: 63 species on 5%+ of 30 checklists Jun 22-30: 66 species on 5%+ of 36 checklists Jul 1-7: 61 species on 5%+ of 24 checklists Jul 8-14: 57 species on 5%+ of 29 checklists Jul 15-21: 55 species on 5%+ of 32 checklists Jul 22-31: 49 species on 5%+ of 34 checklists Aug 1-7: 48 species on 5%+ of 15 checklists Aug 8-14: 60 species on 5%+ of 15 checklists Aug 15-21: 61 species on 5%+ of 16 checklists Aug 22-31: 60 species on 5%+ of 31 checklists Sep 1-7: 64 species on 5%+ of 26 checklists Sep 8-14: 68 species on 5%+ of 33 checklists Sep 15-21: 56 species on 5%+ of 41 checklists Sep 22-30: 69 species on 5%+ of 36 checklists Oct 1-7: 53 species on 5%+ of 21 checklists Oct 8-14: 56 species on 5%+ of 42 checklists Oct 15-21: 55 species on 5%+ of 15 checklists Oct 22-31: 44 species on 5%+ of 26 checklists Nov 1-7: 45 species on 5%+ of 15 checklists Nov 8-14: 39 species on 5%+ of 18 checklists Nov 15-21: 37 species on 5%+ of 14 checklists Nov 22-30: 37 species on 5%+ of 14 checklists Dec 1-7: low data (9 checklists) Dec 8-14: 38 species on 5%+ of 14 checklists Dec 15-21: 38 species on 5%+ of 36 checklists Dec 22-31: 36 species on 5%+ of 40 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 97% 2 American Crow 92% 3 Dark-eyed Junco 92% 4 White-breasted Nuthatch 85% 5 Red-bellied Woodpecker 84% 6 American Goldfinch 80% 7 Blue Jay 77% 8 Downy Woodpecker 74% 9 Hairy Woodpecker 70% 10 Northern Cardinal 69% 11 American Robin 67% 12 Cedar Waxwing 61% 13 House Finch 61% 14 White-throated Sparrow 48% 15 Mourning Dove 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 Wisconsin.
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 Chickadee97%
American Crow92%
Dark-eyed Junco92%
White-breasted Nuthatch85%
Red-bellied Woodpecker84%
American Goldfinch80%
Blue Jay77%
Downy Woodpecker74%
Hairy Woodpecker70%
Northern Cardinal69%
American Robin67%
Cedar Waxwing61%
House Finch61%
White-throated Sparrow48%
Mourning Dove44%