Birding spot · Washington County, Oregon
Birding at Koll Center Wetlands: What You'll See Each Week In November, the birds most often reported at Koll Center Wetlands are Mallard (94%), American Crow (90%), and Pied-billed Grebe (90%). It is busiest in spring, when 75 species turn up on at least 1 in 20 checklists, and species counts peak in late April (76 species). 173 species have been reported here across 6,234 complete checklists from 659 birders.
Species by week 0 20 40 60 80 Jan 1-7: 55 species on 5%+ of 287 checklists Jan 8-14: 57 species on 5%+ of 170 checklists Jan 15-21: 57 species on 5%+ of 147 checklists Jan 22-31: 58 species on 5%+ of 196 checklists Feb 1-7: 64 species on 5%+ of 157 checklists Feb 8-14: 59 species on 5%+ of 124 checklists Feb 15-21: 57 species on 5%+ of 157 checklists Feb 22-28: 61 species on 5%+ of 135 checklists Mar 1-7: 59 species on 5%+ of 144 checklists Mar 8-14: 62 species on 5%+ of 138 checklists Mar 15-21: 59 species on 5%+ of 118 checklists Mar 22-31: 64 species on 5%+ of 180 checklists Apr 1-7: 66 species on 5%+ of 133 checklists Apr 8-14: 66 species on 5%+ of 127 checklists Apr 15-21: 67 species on 5%+ of 112 checklists Apr 22-30: 76 species on 5%+ of 161 checklists May 1-7: 73 species on 5%+ of 144 checklists May 8-14: 72 species on 5%+ of 131 checklists May 15-21: 70 species on 5%+ of 132 checklists May 22-31: 63 species on 5%+ of 124 checklists Jun 1-7: 59 species on 5%+ of 59 checklists Jun 8-14: 59 species on 5%+ of 60 checklists Jun 15-21: 48 species on 5%+ of 63 checklists Jun 22-30: 52 species on 5%+ of 82 checklists Jul 1-7: 53 species on 5%+ of 92 checklists Jul 8-14: 54 species on 5%+ of 79 checklists Jul 15-21: 53 species on 5%+ of 95 checklists Jul 22-31: 53 species on 5%+ of 120 checklists Aug 1-7: 56 species on 5%+ of 92 checklists Aug 8-14: 61 species on 5%+ of 80 checklists Aug 15-21: 53 species on 5%+ of 86 checklists Aug 22-31: 61 species on 5%+ of 170 checklists Sep 1-7: 57 species on 5%+ of 109 checklists Sep 8-14: 57 species on 5%+ of 93 checklists Sep 15-21: 59 species on 5%+ of 105 checklists Sep 22-30: 57 species on 5%+ of 129 checklists Oct 1-7: 61 species on 5%+ of 112 checklists Oct 8-14: 58 species on 5%+ of 129 checklists Oct 15-21: 60 species on 5%+ of 126 checklists Oct 22-31: 64 species on 5%+ of 200 checklists Nov 1-7: 61 species on 5%+ of 152 checklists Nov 8-14: 62 species on 5%+ of 147 checklists Nov 15-21: 60 species on 5%+ of 151 checklists Nov 22-30: 57 species on 5%+ of 191 checklists Dec 1-7: 55 species on 5%+ of 121 checklists Dec 8-14: 54 species on 5%+ of 106 checklists Dec 15-21: 56 species on 5%+ of 88 checklists Dec 22-31: 59 species on 5%+ of 180 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 94% 2 American Crow 90% 3 Pied-billed Grebe 90% 4 American Coot 90% 5 Great Egret 89% 6 Common Merganser 89% 7 Great Blue Heron 88% 8 Canada Goose 82% 9 Gadwall 78% 10 Northern Shoveler 76% 11 Belted Kingfisher 72% 12 Green-winged Teal 69% 13 Song Sparrow 68% 14 Double-crested Cormorant 57% 15 American Robin 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 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 .
Mallard94%
American Crow90%
Pied-billed Grebe90%
American Coot90%
Great Egret89%
Common Merganser89%
Great Blue Heron88%
Canada Goose82%
Gadwall78%
Northern Shoveler76%
Belted Kingfisher72%
Green-winged Teal69%
Song Sparrow68%
Double-crested Cormorant57%
American Robin57%