Birding spot · Contra Costa County, California
Birding at Sibley Volcanic Regional Preserve: What You'll See Each Week In November, the birds most often reported at Sibley Volcanic Regional Preserve are California Scrub-Jay (80%), Dark-eyed Junco (80%), and Spotted Towhee (80%). It is busiest in spring, when 65 species turn up on at least 1 in 20 checklists, and species counts peak in mid April (78 species). 120 species have been reported here across 947 complete checklists from 331 birders.
Species by week 0 20 40 60 80 Jan 1-7: 54 species on 5%+ of 13 checklists Jan 8-14: low data (4 checklists) Jan 15-21: low data (8 checklists) Jan 22-31: 54 species on 5%+ of 19 checklists Feb 1-7: 56 species on 5%+ of 14 checklists Feb 8-14: 57 species on 5%+ of 12 checklists Feb 15-21: 58 species on 5%+ of 18 checklists Feb 22-28: 60 species on 5%+ of 20 checklists Mar 1-7: 56 species on 5%+ of 14 checklists Mar 8-14: 53 species on 5%+ of 27 checklists Mar 15-21: 58 species on 5%+ of 23 checklists Mar 22-31: 59 species on 5%+ of 33 checklists Apr 1-7: 66 species on 5%+ of 19 checklists Apr 8-14: 59 species on 5%+ of 29 checklists Apr 15-21: 78 species on 5%+ of 18 checklists Apr 22-30: 71 species on 5%+ of 35 checklists May 1-7: 58 species on 5%+ of 25 checklists May 8-14: 68 species on 5%+ of 40 checklists May 15-21: 66 species on 5%+ of 31 checklists May 22-31: 64 species on 5%+ of 35 checklists Jun 1-7: 63 species on 5%+ of 74 checklists Jun 8-14: 65 species on 5%+ of 52 checklists Jun 15-21: 60 species on 5%+ of 35 checklists Jun 22-30: 64 species on 5%+ of 19 checklists Jul 1-7: 62 species on 5%+ of 18 checklists Jul 8-14: 58 species on 5%+ of 11 checklists Jul 15-21: 53 species on 5%+ of 16 checklists Jul 22-31: 57 species on 5%+ of 16 checklists Aug 1-7: 57 species on 5%+ of 17 checklists Aug 8-14: 47 species on 5%+ of 11 checklists Aug 15-21: 48 species on 5%+ of 10 checklists Aug 22-31: 54 species on 5%+ of 19 checklists Sep 1-7: 48 species on 5%+ of 12 checklists Sep 8-14: 54 species on 5%+ of 12 checklists Sep 15-21: 58 species on 5%+ of 13 checklists Sep 22-30: 65 species on 5%+ of 12 checklists Oct 1-7: 55 species on 5%+ of 10 checklists Oct 8-14: 63 species on 5%+ of 18 checklists Oct 15-21: 67 species on 5%+ of 16 checklists Oct 22-31: 47 species on 5%+ of 21 checklists Nov 1-7: 59 species on 5%+ of 12 checklists Nov 8-14: 51 species on 5%+ of 12 checklists Nov 15-21: 54 species on 5%+ of 10 checklists Nov 22-30: 56 species on 5%+ of 15 checklists Dec 1-7: 46 species on 5%+ of 11 checklists Dec 8-14: 49 species on 5%+ of 10 checklists Dec 15-21: 57 species on 5%+ of 12 checklists Dec 22-31: 60 species on 5%+ of 16 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 California Scrub-Jay 80% 2 Dark-eyed Junco 80% 3 Spotted Towhee 80% 4 Common Raven 73% 5 Golden-crowned Sparrow 73% 6 Ruby-crowned Kinglet 69% 7 Red-tailed Hawk 63% 8 California Towhee 61% 9 Chestnut-backed Chickadee 61% 10 Wrentit 59% 11 Bewick's Wren 57% 12 Steller's Jay 57% 13 Hermit Thrush 55% 14 Northern Flicker 55% 15 Fox Sparrow 51% 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 .
California Scrub-Jay80%
Dark-eyed Junco80%
Spotted Towhee80%
Common Raven73%
Golden-crowned Sparrow73%
Ruby-crowned Kinglet69%
Red-tailed Hawk63%
California Towhee61%
Chestnut-backed Chickadee61%
Wrentit59%
Bewick's Wren57%
Steller's Jay57%
Hermit Thrush55%
Northern Flicker55%
Fox Sparrow51%