Birding spot · Windham County, Connecticut
Birding at Mansfield Hollow Lake: What You'll See Each Week In November, the birds most often reported at Mansfield Hollow Lake are American Crow (76%), Ring-billed Gull (72%), and Mallard (64%). It is busiest in summer, when 73 species turn up on at least 1 in 20 checklists, and species counts peak in late May (84 species). 174 species have been reported here across 1,313 complete checklists from 220 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 26 species on 5%+ of 10 checklists Jan 8-14: low data (3 checklists) Jan 15-21: low data (5 checklists) Jan 22-31: 32 species on 5%+ of 17 checklists Feb 1-7: low data (9 checklists) Feb 8-14: low data (5 checklists) Feb 15-21: 28 species on 5%+ of 11 checklists Feb 22-28: low data (7 checklists) Mar 1-7: 39 species on 5%+ of 12 checklists Mar 8-14: 40 species on 5%+ of 29 checklists Mar 15-21: 44 species on 5%+ of 17 checklists Mar 22-31: 36 species on 5%+ of 25 checklists Apr 1-7: 38 species on 5%+ of 15 checklists Apr 8-14: 60 species on 5%+ of 17 checklists Apr 15-21: 38 species on 5%+ of 23 checklists Apr 22-30: 65 species on 5%+ of 38 checklists May 1-7: 54 species on 5%+ of 46 checklists May 8-14: 70 species on 5%+ of 10 checklists May 15-21: 72 species on 5%+ of 13 checklists May 22-31: 84 species on 5%+ of 18 checklists Jun 1-7: 64 species on 5%+ of 10 checklists Jun 8-14: low data (9 checklists) Jun 15-21: 79 species on 5%+ of 15 checklists Jun 22-30: 67 species on 5%+ of 30 checklists Jul 1-7: 78 species on 5%+ of 40 checklists Jul 8-14: 70 species on 5%+ of 46 checklists Jul 15-21: 60 species on 5%+ of 42 checklists Jul 22-31: 65 species on 5%+ of 49 checklists Aug 1-7: 72 species on 5%+ of 38 checklists Aug 8-14: 68 species on 5%+ of 60 checklists Aug 15-21: 70 species on 5%+ of 67 checklists Aug 22-31: 62 species on 5%+ of 101 checklists Sep 1-7: 65 species on 5%+ of 85 checklists Sep 8-14: 60 species on 5%+ of 35 checklists Sep 15-21: 64 species on 5%+ of 54 checklists Sep 22-30: 69 species on 5%+ of 70 checklists Oct 1-7: 72 species on 5%+ of 36 checklists Oct 8-14: 74 species on 5%+ of 38 checklists Oct 15-21: 63 species on 5%+ of 33 checklists Oct 22-31: 44 species on 5%+ of 25 checklists Nov 1-7: 40 species on 5%+ of 21 checklists Nov 8-14: 58 species on 5%+ of 19 checklists Nov 15-21: 59 species on 5%+ of 16 checklists Nov 22-30: 42 species on 5%+ of 11 checklists Dec 1-7: low data (5 checklists) Dec 8-14: low data (9 checklists) Dec 15-21: 27 species on 5%+ of 10 checklists Dec 22-31: low data (9 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 American Crow 76% 2 Ring-billed Gull 72% 3 Mallard 64% 4 Belted Kingfisher 55% 5 Blue Jay 54% 6 Great Blue Heron 42% 7 Canada Goose 40% 8 Dark-eyed Junco 36% 9 Snow Bunting 33% 10 American Goldfinch 31% 11 Bald Eagle 25% 12 Black-capped Chickadee 25% 13 Red-tailed Hawk 25% 14 Eastern Bluebird 24% 15 Greater Yellowlegs 24% 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 Connecticut.
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 .
American Crow76%
Ring-billed Gull72%
Mallard64%
Belted Kingfisher55%
Blue Jay54%
Great Blue Heron42%
Canada Goose40%
Dark-eyed Junco36%
Snow Bunting33%
American Goldfinch31%
Bald Eagle25%
Black-capped Chickadee25%
Red-tailed Hawk25%
Eastern Bluebird24%
Greater Yellowlegs24%