Birding spot · Contra Costa County, California
Birding at Lake Anza: What You'll See Each Week In November, the birds most often reported at Lake Anza are Hermit Thrush (87%), Ruby-crowned Kinglet (82%), and Black Phoebe (78%). It is busiest in spring, when 59 species turn up on at least 1 in 20 checklists, and species counts peak in mid May (60 species). 106 species have been reported here across 1,288 complete checklists from 539 birders.
Species by week 0 20 40 60 Jan 1-7: 39 species on 5%+ of 10 checklists Jan 8-14: 36 species on 5%+ of 14 checklists Jan 15-21: 30 species on 5%+ of 11 checklists Jan 22-31: 48 species on 5%+ of 20 checklists Feb 1-7: 48 species on 5%+ of 19 checklists Feb 8-14: 48 species on 5%+ of 19 checklists Feb 15-21: 42 species on 5%+ of 24 checklists Feb 22-28: 50 species on 5%+ of 36 checklists Mar 1-7: 54 species on 5%+ of 31 checklists Mar 8-14: 50 species on 5%+ of 21 checklists Mar 15-21: 51 species on 5%+ of 29 checklists Mar 22-31: 51 species on 5%+ of 35 checklists Apr 1-7: 55 species on 5%+ of 20 checklists Apr 8-14: 50 species on 5%+ of 21 checklists Apr 15-21: 52 species on 5%+ of 29 checklists Apr 22-30: 57 species on 5%+ of 34 checklists May 1-7: 55 species on 5%+ of 29 checklists May 8-14: 56 species on 5%+ of 30 checklists May 15-21: 60 species on 5%+ of 40 checklists May 22-31: 58 species on 5%+ of 40 checklists Jun 1-7: 54 species on 5%+ of 33 checklists Jun 8-14: 46 species on 5%+ of 24 checklists Jun 15-21: 43 species on 5%+ of 23 checklists Jun 22-30: 47 species on 5%+ of 25 checklists Jul 1-7: 45 species on 5%+ of 29 checklists Jul 8-14: 49 species on 5%+ of 22 checklists Jul 15-21: 48 species on 5%+ of 25 checklists Jul 22-31: 44 species on 5%+ of 22 checklists Aug 1-7: 44 species on 5%+ of 22 checklists Aug 8-14: 42 species on 5%+ of 25 checklists Aug 15-21: 56 species on 5%+ of 19 checklists Aug 22-31: 43 species on 5%+ of 53 checklists Sep 1-7: 46 species on 5%+ of 34 checklists Sep 8-14: 49 species on 5%+ of 35 checklists Sep 15-21: 48 species on 5%+ of 24 checklists Sep 22-30: 52 species on 5%+ of 33 checklists Oct 1-7: 53 species on 5%+ of 20 checklists Oct 8-14: 50 species on 5%+ of 25 checklists Oct 15-21: 46 species on 5%+ of 27 checklists Oct 22-31: 44 species on 5%+ of 71 checklists Nov 1-7: 40 species on 5%+ of 35 checklists Nov 8-14: 52 species on 5%+ of 38 checklists Nov 15-21: 48 species on 5%+ of 16 checklists Nov 22-30: 41 species on 5%+ of 26 checklists Dec 1-7: low data (9 checklists) Dec 8-14: low data (9 checklists) Dec 15-21: 40 species on 5%+ of 30 checklists Dec 22-31: 36 species on 5%+ of 22 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 Hermit Thrush 87% 2 Ruby-crowned Kinglet 82% 3 Black Phoebe 78% 4 Anna's Hummingbird 77% 5 Golden-crowned Sparrow 73% 6 Spotted Towhee 72% 7 Steller's Jay 70% 8 Chestnut-backed Chickadee 64% 9 Dark-eyed Junco 60% 10 Common Raven 56% 11 Red-breasted Nuthatch 51% 12 Bewick's Wren 50% 13 Northern Flicker 47% 14 Yellow-rumped Warbler 47% 15 Townsend's Warbler 46% 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 .
Hermit Thrush87%
Ruby-crowned Kinglet82%
Black Phoebe78%
Anna's Hummingbird77%
Golden-crowned Sparrow73%
Spotted Towhee72%
Steller's Jay70%
Chestnut-backed Chickadee64%
Dark-eyed Junco60%
Common Raven56%
Red-breasted Nuthatch51%
Bewick's Wren50%
Northern Flicker47%
Yellow-rumped Warbler47%
Townsend's Warbler46%