Birding spot · Orange County, California
Birding at Bolsa Bay: What You'll See Each Week In November, the birds most often reported at Bolsa Bay are Ruddy Duck (83%), American Wigeon (81%), and Bufflehead (81%). It is busiest in fall, when 100 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of December (115 species). 196 species have been reported here across 1,598 complete checklists from 561 birders.
Species by week 0 25 50 75 100 125 Jan 1-7: 100 species on 5%+ of 89 checklists Jan 8-14: 101 species on 5%+ of 49 checklists Jan 15-21: 89 species on 5%+ of 66 checklists Jan 22-31: 96 species on 5%+ of 64 checklists Feb 1-7: 78 species on 5%+ of 69 checklists Feb 8-14: 103 species on 5%+ of 54 checklists Feb 15-21: 89 species on 5%+ of 33 checklists Feb 22-28: 96 species on 5%+ of 28 checklists Mar 1-7: 105 species on 5%+ of 12 checklists Mar 8-14: 82 species on 5%+ of 33 checklists Mar 15-21: 94 species on 5%+ of 41 checklists Mar 22-31: 95 species on 5%+ of 26 checklists Apr 1-7: 99 species on 5%+ of 15 checklists Apr 8-14: 105 species on 5%+ of 15 checklists Apr 15-21: 87 species on 5%+ of 22 checklists Apr 22-30: 88 species on 5%+ of 52 checklists May 1-7: 79 species on 5%+ of 24 checklists May 8-14: 76 species on 5%+ of 28 checklists May 15-21: 78 species on 5%+ of 13 checklists May 22-31: 75 species on 5%+ of 28 checklists Jun 1-7: 88 species on 5%+ of 12 checklists Jun 8-14: 62 species on 5%+ of 24 checklists Jun 15-21: 76 species on 5%+ of 11 checklists Jun 22-30: 63 species on 5%+ of 23 checklists Jul 1-7: 79 species on 5%+ of 16 checklists Jul 8-14: 76 species on 5%+ of 18 checklists Jul 15-21: 78 species on 5%+ of 20 checklists Jul 22-31: 72 species on 5%+ of 26 checklists Aug 1-7: 83 species on 5%+ of 17 checklists Aug 8-14: 81 species on 5%+ of 27 checklists Aug 15-21: 72 species on 5%+ of 21 checklists Aug 22-31: 72 species on 5%+ of 34 checklists Sep 1-7: 84 species on 5%+ of 14 checklists Sep 8-14: 91 species on 5%+ of 18 checklists Sep 15-21: 67 species on 5%+ of 22 checklists Sep 22-30: 79 species on 5%+ of 22 checklists Oct 1-7: 106 species on 5%+ of 19 checklists Oct 8-14: 94 species on 5%+ of 32 checklists Oct 15-21: 98 species on 5%+ of 42 checklists Oct 22-31: 94 species on 5%+ of 61 checklists Nov 1-7: 101 species on 5%+ of 52 checklists Nov 8-14: 100 species on 5%+ of 51 checklists Nov 15-21: 109 species on 5%+ of 36 checklists Nov 22-30: 106 species on 5%+ of 56 checklists Dec 1-7: 106 species on 5%+ of 60 checklists Dec 8-14: 115 species on 5%+ of 35 checklists Dec 15-21: 95 species on 5%+ of 25 checklists Dec 22-31: 99 species on 5%+ of 43 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 Ruddy Duck 83% 2 American Wigeon 81% 3 Bufflehead 81% 4 Snowy Egret 81% 5 American White Pelican 78% 6 Double-crested Cormorant 75% 7 White-crowned Sparrow 74% 8 American Coot 74% 9 Great Egret 73% 10 House Finch 73% 11 Black Phoebe 70% 12 Northern Pintail 70% 13 Great Blue Heron 69% 14 Pied-billed Grebe 69% 15 Lesser Scaup 68% 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 California.
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 .
Ruddy Duck83%
American Wigeon81%
Bufflehead81%
Snowy Egret81%
American White Pelican78%
Double-crested Cormorant75%
White-crowned Sparrow74%
American Coot74%
Great Egret73%
House Finch73%
Black Phoebe70%
Northern Pintail70%
Great Blue Heron69%
Pied-billed Grebe69%
Lesser Scaup68%