Birding spot · San Luis Obispo County, California
Birding at Oso Flaco Lake: What You'll See Each Week In November, the birds most often reported at Oso Flaco Lake are American Coot (94%), Ruddy Duck (94%), and Northern Shoveler (91%). It is busiest in fall, when 98 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of October (102 species). 227 species have been reported here across 2,699 complete checklists from 837 birders.
Species by week 0 25 50 75 100 125 Jan 1-7: 84 species on 5%+ of 45 checklists Jan 8-14: 84 species on 5%+ of 50 checklists Jan 15-21: 84 species on 5%+ of 86 checklists Jan 22-31: 86 species on 5%+ of 73 checklists Feb 1-7: 78 species on 5%+ of 52 checklists Feb 8-14: 85 species on 5%+ of 60 checklists Feb 15-21: 78 species on 5%+ of 47 checklists Feb 22-28: 82 species on 5%+ of 59 checklists Mar 1-7: 85 species on 5%+ of 38 checklists Mar 8-14: 91 species on 5%+ of 20 checklists Mar 15-21: 72 species on 5%+ of 32 checklists Mar 22-31: 75 species on 5%+ of 53 checklists Apr 1-7: 90 species on 5%+ of 58 checklists Apr 8-14: 77 species on 5%+ of 42 checklists Apr 15-21: 86 species on 5%+ of 62 checklists Apr 22-30: 90 species on 5%+ of 85 checklists May 1-7: 83 species on 5%+ of 94 checklists May 8-14: 86 species on 5%+ of 121 checklists May 15-21: 82 species on 5%+ of 93 checklists May 22-31: 72 species on 5%+ of 101 checklists Jun 1-7: 67 species on 5%+ of 44 checklists Jun 8-14: 66 species on 5%+ of 52 checklists Jun 15-21: 61 species on 5%+ of 44 checklists Jun 22-30: 65 species on 5%+ of 56 checklists Jul 1-7: 72 species on 5%+ of 37 checklists Jul 8-14: 78 species on 5%+ of 39 checklists Jul 15-21: 72 species on 5%+ of 40 checklists Jul 22-31: 69 species on 5%+ of 63 checklists Aug 1-7: 70 species on 5%+ of 44 checklists Aug 8-14: 84 species on 5%+ of 40 checklists Aug 15-21: 70 species on 5%+ of 71 checklists Aug 22-31: 86 species on 5%+ of 88 checklists Sep 1-7: 88 species on 5%+ of 74 checklists Sep 8-14: 91 species on 5%+ of 59 checklists Sep 15-21: 82 species on 5%+ of 44 checklists Sep 22-30: 92 species on 5%+ of 52 checklists Oct 1-7: 95 species on 5%+ of 45 checklists Oct 8-14: 102 species on 5%+ of 53 checklists Oct 15-21: 96 species on 5%+ of 44 checklists Oct 22-31: 97 species on 5%+ of 77 checklists Nov 1-7: 98 species on 5%+ of 60 checklists Nov 8-14: 94 species on 5%+ of 60 checklists Nov 15-21: 96 species on 5%+ of 36 checklists Nov 22-30: 88 species on 5%+ of 66 checklists Dec 1-7: 93 species on 5%+ of 37 checklists Dec 8-14: 94 species on 5%+ of 18 checklists Dec 15-21: 67 species on 5%+ of 25 checklists Dec 22-31: 87 species on 5%+ of 60 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 Coot 94% 2 Ruddy Duck 94% 3 Northern Shoveler 91% 4 Pied-billed Grebe 89% 5 Cinnamon Teal 88% 6 Black Phoebe 87% 7 Double-crested Cormorant 87% 8 Yellow-rumped Warbler 87% 9 Black-crowned Night Heron 77% 10 Great Blue Heron 75% 11 Ruby-crowned Kinglet 75% 12 Wrentit 74% 13 Song Sparrow 74% 14 Bufflehead 73% 15 Chestnut-backed Chickadee 71% 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 .
American Coot94%
Ruddy Duck94%
Northern Shoveler91%
Pied-billed Grebe89%
Cinnamon Teal88%
Black Phoebe87%
Double-crested Cormorant87%
Yellow-rumped Warbler87%
Black-crowned Night Heron77%
Great Blue Heron75%
Ruby-crowned Kinglet75%
Wrentit74%
Song Sparrow74%
Bufflehead73%
Chestnut-backed Chickadee71%