Birding spot · Santa Clara County, California
Birding at Calero Reservoir: What You'll See Each Week In November, the birds most often reported at Calero Reservoir are American Coot (98%), Western Grebe (82%), and Ruddy Duck (80%). It is busiest in spring, when 76 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of November (83 species). 150 species have been reported here across 998 complete checklists from 365 birders.
Species by week 0 20 40 60 80 100 Jan 1-7: 77 species on 5%+ of 46 checklists Jan 8-14: 76 species on 5%+ of 17 checklists Jan 15-21: 73 species on 5%+ of 26 checklists Jan 22-31: 58 species on 5%+ of 29 checklists Feb 1-7: 64 species on 5%+ of 21 checklists Feb 8-14: 65 species on 5%+ of 46 checklists Feb 15-21: 60 species on 5%+ of 44 checklists Feb 22-28: 54 species on 5%+ of 24 checklists Mar 1-7: 67 species on 5%+ of 27 checklists Mar 8-14: 81 species on 5%+ of 16 checklists Mar 15-21: 77 species on 5%+ of 20 checklists Mar 22-31: 77 species on 5%+ of 33 checklists Apr 1-7: 71 species on 5%+ of 21 checklists Apr 8-14: 68 species on 5%+ of 14 checklists Apr 15-21: 55 species on 5%+ of 23 checklists Apr 22-30: 48 species on 5%+ of 23 checklists May 1-7: 57 species on 5%+ of 29 checklists May 8-14: 72 species on 5%+ of 30 checklists May 15-21: 65 species on 5%+ of 17 checklists May 22-31: 51 species on 5%+ of 43 checklists Jun 1-7: 51 species on 5%+ of 23 checklists Jun 8-14: 63 species on 5%+ of 18 checklists Jun 15-21: 46 species on 5%+ of 26 checklists Jun 22-30: 58 species on 5%+ of 15 checklists Jul 1-7: 59 species on 5%+ of 14 checklists Jul 8-14: low data (7 checklists) Jul 15-21: 44 species on 5%+ of 61 checklists Jul 22-31: 48 species on 5%+ of 52 checklists Aug 1-7: 41 species on 5%+ of 21 checklists Aug 8-14: low data (8 checklists) Aug 15-21: 58 species on 5%+ of 10 checklists Aug 22-31: low data (6 checklists) Sep 1-7: low data (8 checklists) Sep 8-14: low data (7 checklists) Sep 15-21: 57 species on 5%+ of 31 checklists Sep 22-30: 69 species on 5%+ of 13 checklists Oct 1-7: low data (3 checklists) Oct 8-14: low data (6 checklists) Oct 15-21: 53 species on 5%+ of 10 checklists Oct 22-31: low data (9 checklists) Nov 1-7: 64 species on 5%+ of 10 checklists Nov 8-14: 83 species on 5%+ of 19 checklists Nov 15-21: 81 species on 5%+ of 15 checklists Nov 22-30: 80 species on 5%+ of 12 checklists Dec 1-7: low data (8 checklists) Dec 8-14: low data (9 checklists) Dec 15-21: low data (5 checklists) Dec 22-31: 80 species on 5%+ of 23 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 98% 2 Western Grebe 82% 3 Ruddy Duck 80% 4 Turkey Vulture 80% 5 American Crow 77% 6 Pied-billed Grebe 73% 7 Great Egret 71% 8 Red-tailed Hawk 70% 9 Double-crested Cormorant 68% 10 White-crowned Sparrow 68% 11 Bufflehead 64% 12 Clark's Grebe 64% 13 House Finch 64% 14 Song Sparrow 63% 15 Black Phoebe 57% 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 Coot98%
Western Grebe82%
Ruddy Duck80%
Turkey Vulture80%
American Crow77%
Pied-billed Grebe73%
Great Egret71%
Red-tailed Hawk70%
Double-crested Cormorant68%
White-crowned Sparrow68%
Bufflehead64%
Clark's Grebe64%
House Finch64%
Song Sparrow63%
Black Phoebe57%