Birding spot · Washington County, Oregon
Birding at Commonwealth Lake Park: What You'll See Each Week In November, the birds most often reported at Commonwealth Lake Park are Mallard (97%), American Wigeon (94%), and Pied-billed Grebe (93%). It is busiest in spring, when 75 species turn up on at least 1 in 20 checklists, and species counts peak in early May (74 species). 163 species have been reported here across 4,071 complete checklists from 589 birders.
Species by week 0 20 40 60 80 Jan 1-7: 59 species on 5%+ of 146 checklists Jan 8-14: 62 species on 5%+ of 89 checklists Jan 15-21: 55 species on 5%+ of 109 checklists Jan 22-31: 59 species on 5%+ of 151 checklists Feb 1-7: 61 species on 5%+ of 106 checklists Feb 8-14: 64 species on 5%+ of 91 checklists Feb 15-21: 59 species on 5%+ of 104 checklists Feb 22-28: 61 species on 5%+ of 101 checklists Mar 1-7: 60 species on 5%+ of 112 checklists Mar 8-14: 60 species on 5%+ of 77 checklists Mar 15-21: 62 species on 5%+ of 127 checklists Mar 22-31: 66 species on 5%+ of 130 checklists Apr 1-7: 70 species on 5%+ of 115 checklists Apr 8-14: 69 species on 5%+ of 123 checklists Apr 15-21: 71 species on 5%+ of 128 checklists Apr 22-30: 70 species on 5%+ of 176 checklists May 1-7: 74 species on 5%+ of 107 checklists May 8-14: 65 species on 5%+ of 99 checklists May 15-21: 67 species on 5%+ of 80 checklists May 22-31: 63 species on 5%+ of 92 checklists Jun 1-7: 53 species on 5%+ of 55 checklists Jun 8-14: 53 species on 5%+ of 45 checklists Jun 15-21: 50 species on 5%+ of 64 checklists Jun 22-30: 48 species on 5%+ of 54 checklists Jul 1-7: 51 species on 5%+ of 37 checklists Jul 8-14: 48 species on 5%+ of 43 checklists Jul 15-21: 51 species on 5%+ of 46 checklists Jul 22-31: 46 species on 5%+ of 65 checklists Aug 1-7: 53 species on 5%+ of 53 checklists Aug 8-14: 55 species on 5%+ of 44 checklists Aug 15-21: 57 species on 5%+ of 62 checklists Aug 22-31: 64 species on 5%+ of 58 checklists Sep 1-7: 59 species on 5%+ of 46 checklists Sep 8-14: 69 species on 5%+ of 63 checklists Sep 15-21: 66 species on 5%+ of 61 checklists Sep 22-30: 69 species on 5%+ of 76 checklists Oct 1-7: 66 species on 5%+ of 59 checklists Oct 8-14: 57 species on 5%+ of 63 checklists Oct 15-21: 65 species on 5%+ of 55 checklists Oct 22-31: 63 species on 5%+ of 91 checklists Nov 1-7: 61 species on 5%+ of 65 checklists Nov 8-14: 60 species on 5%+ of 75 checklists Nov 15-21: 61 species on 5%+ of 66 checklists Nov 22-30: 60 species on 5%+ of 96 checklists Dec 1-7: 62 species on 5%+ of 75 checklists Dec 8-14: 58 species on 5%+ of 78 checklists Dec 15-21: 56 species on 5%+ of 62 checklists Dec 22-31: 61 species on 5%+ of 151 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 Mallard 97% 2 American Wigeon 94% 3 Pied-billed Grebe 93% 4 American Crow 92% 5 Song Sparrow 76% 6 Great Blue Heron 71% 7 Double-crested Cormorant 71% 8 Red-winged Blackbird 67% 9 Black-capped Chickadee 63% 10 California Scrub-Jay 63% 11 Canada Goose 63% 12 Cackling Goose 59% 13 Northern Flicker 59% 14 Northern Shoveler 58% 15 Green-winged Teal 50% 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 Oregon.
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 .
Mallard97%
American Wigeon94%
Pied-billed Grebe93%
American Crow92%
Song Sparrow76%
Great Blue Heron71%
Double-crested Cormorant71%
Red-winged Blackbird67%
Black-capped Chickadee63%
California Scrub-Jay63%
Canada Goose63%
Cackling Goose59%
Northern Flicker59%
Northern Shoveler58%
Green-winged Teal50%