Birding spot · Snohomish County, Washington
Birding at Hat Slough: What You'll See Each Week In November, the birds most often reported at Hat Slough are Bald Eagle (75%), Northern Harrier (66%), and Song Sparrow (63%). It is busiest in fall, when 62 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of May (75 species). 129 species have been reported here across 869 complete checklists from 175 birders.
Species by week 0 20 40 60 80 Jan 1-7: 48 species on 5%+ of 55 checklists Jan 8-14: 37 species on 5%+ of 41 checklists Jan 15-21: 52 species on 5%+ of 40 checklists Jan 22-31: 41 species on 5%+ of 43 checklists Feb 1-7: 52 species on 5%+ of 35 checklists Feb 8-14: 43 species on 5%+ of 26 checklists Feb 15-21: 43 species on 5%+ of 46 checklists Feb 22-28: 54 species on 5%+ of 40 checklists Mar 1-7: 51 species on 5%+ of 33 checklists Mar 8-14: 51 species on 5%+ of 31 checklists Mar 15-21: 54 species on 5%+ of 26 checklists Mar 22-31: 56 species on 5%+ of 29 checklists Apr 1-7: 57 species on 5%+ of 15 checklists Apr 8-14: 48 species on 5%+ of 24 checklists Apr 15-21: 67 species on 5%+ of 31 checklists Apr 22-30: 55 species on 5%+ of 11 checklists May 1-7: 68 species on 5%+ of 20 checklists May 8-14: 75 species on 5%+ of 17 checklists May 15-21: 41 species on 5%+ of 10 checklists May 22-31: low data (7 checklists) Jun 1-7: low data (2 checklists) Jun 8-14: low data (1 checklists) Jun 15-21: low data (4 checklists) Jun 22-30: low data (3 checklists) Jul 1-7: low data (6 checklists) Jul 8-14: low data (3 checklists) Jul 15-21: low data (4 checklists) Jul 22-31: low data (3 checklists) Aug 1-7: low data (2 checklists) Aug 8-14: low data (5 checklists) Aug 15-21: low data (5 checklists) Aug 22-31: low data (6 checklists) Sep 1-7: low data (2 checklists) Sep 8-14: low data (8 checklists) Sep 15-21: 59 species on 5%+ of 10 checklists Sep 22-30: 64 species on 5%+ of 18 checklists Oct 1-7: 67 species on 5%+ of 19 checklists Oct 8-14: 61 species on 5%+ of 14 checklists Oct 15-21: low data (5 checklists) Oct 22-31: 44 species on 5%+ of 26 checklists Nov 1-7: 44 species on 5%+ of 11 checklists Nov 8-14: 51 species on 5%+ of 20 checklists Nov 15-21: 63 species on 5%+ of 16 checklists Nov 22-30: 41 species on 5%+ of 21 checklists Dec 1-7: 60 species on 5%+ of 17 checklists Dec 8-14: 49 species on 5%+ of 14 checklists Dec 15-21: 55 species on 5%+ of 16 checklists Dec 22-31: 54 species on 5%+ of 28 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 Bald Eagle 75% 2 Northern Harrier 66% 3 Song Sparrow 63% 4 European Starling 62% 5 Snow Goose 57% 6 Red-tailed Hawk 56% 7 American Kestrel 54% 8 Trumpeter Swan 49% 9 Mallard 46% 10 Western Meadowlark 44% 11 Great Blue Heron 43% 12 Red-winged Blackbird 38% 13 American Robin 37% 14 Northern Flicker 35% 15 Common Raven 34% 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 Washington.
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 .
Bald Eagle75%
Song Sparrow63%
European Starling62%
Snow Goose57%
Red-tailed Hawk56%
American Kestrel54%
Trumpeter Swan49%
Mallard46%
Western Meadowlark44%
Great Blue Heron43%
Red-winged Blackbird38%
American Robin37%
Northern Flicker35%
Common Raven34%