Birding spot · Essex County, Massachusetts
Birding at Castle Rock Beach: What You'll See Each Week In November, the birds most often reported at Castle Rock Beach are Common Eider (99%), American Herring Gull (94%), and Common Loon (78%). It is busiest in summer, when 44 species turn up on at least 1 in 20 checklists, and species counts peak in mid July (49 species). 110 species have been reported here across 1,043 complete checklists from 134 birders.
Species by week 0 10 20 30 40 50 Jan 1-7: 27 species on 5%+ of 22 checklists Jan 8-14: 28 species on 5%+ of 22 checklists Jan 15-21: 29 species on 5%+ of 16 checklists Jan 22-31: 38 species on 5%+ of 17 checklists Feb 1-7: 33 species on 5%+ of 19 checklists Feb 8-14: 33 species on 5%+ of 25 checklists Feb 15-21: 35 species on 5%+ of 17 checklists Feb 22-28: 35 species on 5%+ of 31 checklists Mar 1-7: 30 species on 5%+ of 24 checklists Mar 8-14: 34 species on 5%+ of 23 checklists Mar 15-21: 35 species on 5%+ of 21 checklists Mar 22-31: 33 species on 5%+ of 27 checklists Apr 1-7: 39 species on 5%+ of 34 checklists Apr 8-14: 37 species on 5%+ of 30 checklists Apr 15-21: 35 species on 5%+ of 23 checklists Apr 22-30: 32 species on 5%+ of 24 checklists May 1-7: 35 species on 5%+ of 23 checklists May 8-14: 43 species on 5%+ of 17 checklists May 15-21: 36 species on 5%+ of 15 checklists May 22-31: 37 species on 5%+ of 16 checklists Jun 1-7: 39 species on 5%+ of 15 checklists Jun 8-14: 37 species on 5%+ of 14 checklists Jun 15-21: 35 species on 5%+ of 17 checklists Jun 22-30: 33 species on 5%+ of 10 checklists Jul 1-7: 46 species on 5%+ of 19 checklists Jul 8-14: 38 species on 5%+ of 22 checklists Jul 15-21: 49 species on 5%+ of 16 checklists Jul 22-31: 41 species on 5%+ of 29 checklists Aug 1-7: 42 species on 5%+ of 26 checklists Aug 8-14: 34 species on 5%+ of 24 checklists Aug 15-21: 32 species on 5%+ of 24 checklists Aug 22-31: 32 species on 5%+ of 37 checklists Sep 1-7: 28 species on 5%+ of 28 checklists Sep 8-14: 37 species on 5%+ of 26 checklists Sep 15-21: 32 species on 5%+ of 18 checklists Sep 22-30: 22 species on 5%+ of 28 checklists Oct 1-7: 34 species on 5%+ of 14 checklists Oct 8-14: 30 species on 5%+ of 27 checklists Oct 15-21: 37 species on 5%+ of 16 checklists Oct 22-31: 38 species on 5%+ of 32 checklists Nov 1-7: 35 species on 5%+ of 28 checklists Nov 8-14: 31 species on 5%+ of 26 checklists Nov 15-21: 30 species on 5%+ of 23 checklists Nov 22-30: 40 species on 5%+ of 20 checklists Dec 1-7: 41 species on 5%+ of 15 checklists Dec 8-14: 27 species on 5%+ of 14 checklists Dec 15-21: 26 species on 5%+ of 10 checklists Dec 22-31: 33 species on 5%+ of 19 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 Common Eider 99% 2 American Herring Gull 94% 3 Common Loon 78% 4 Great Black-backed Gull 73% 5 Red-breasted Merganser 67% 6 Song Sparrow 63% 7 Double-crested Cormorant 45% 8 Bufflehead 43% 9 White-winged Scoter 39% 10 Northern Gannet 35% 11 Northern Cardinal 34% 12 Surf Scoter 32% 13 Great Cormorant 27% 14 House Finch 27% 15 American Crow 26% 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 Massachusetts.
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 .
Common Eider99%
American Herring Gull94%
Common Loon78%
Great Black-backed Gull73%
Red-breasted Merganser67%
Song Sparrow63%
Double-crested Cormorant45%
Bufflehead43%
White-winged Scoter39%
Northern Gannet35%
Northern Cardinal34%
Surf Scoter32%
Great Cormorant27%
House Finch27%
American Crow26%