WhenToBird

Birding spot · Multnomah County, Oregon

Birding at Mud Slough: What You'll See Each Week

In November, the birds most often reported at Mud Slough are Mallard (94%), American Crow (88%), and Cackling Goose (88%). It is busiest in spring, when 81 species turn up on at least 1 in 20 checklists, and species counts peak in late September (79 species). 146 species have been reported here across 902 complete checklists from 89 birders.

Species by week

020406080Jan 1-7: 76 species on 5%+ of 20 checklistsJan 8-14: 69 species on 5%+ of 17 checklistsJan 15-21: 56 species on 5%+ of 21 checklistsJan 22-31: 68 species on 5%+ of 25 checklistsFeb 1-7: 65 species on 5%+ of 16 checklistsFeb 8-14: 51 species on 5%+ of 13 checklistsFeb 15-21: 72 species on 5%+ of 20 checklistsFeb 22-28: 65 species on 5%+ of 19 checklistsMar 1-7: 74 species on 5%+ of 18 checklistsMar 8-14: 75 species on 5%+ of 17 checklistsMar 15-21: 77 species on 5%+ of 16 checklistsMar 22-31: 78 species on 5%+ of 20 checklistsApr 1-7: 62 species on 5%+ of 23 checklistsApr 8-14: 75 species on 5%+ of 16 checklistsApr 15-21: 73 species on 5%+ of 13 checklistsApr 22-30: 70 species on 5%+ of 23 checklistsMay 1-7: 71 species on 5%+ of 23 checklistsMay 8-14: 68 species on 5%+ of 16 checklistsMay 15-21: 61 species on 5%+ of 12 checklistsMay 22-31: 74 species on 5%+ of 20 checklistsJun 1-7: 74 species on 5%+ of 17 checklistsJun 8-14: 65 species on 5%+ of 11 checklistsJun 15-21: 56 species on 5%+ of 10 checklistsJun 22-30: 65 species on 5%+ of 15 checklistsJul 1-7: 68 species on 5%+ of 15 checklistsJul 8-14: 71 species on 5%+ of 17 checklistsJul 15-21: 69 species on 5%+ of 19 checklistsJul 22-31: 57 species on 5%+ of 31 checklistsAug 1-7: 55 species on 5%+ of 31 checklistsAug 8-14: 57 species on 5%+ of 30 checklistsAug 15-21: 58 species on 5%+ of 26 checklistsAug 22-31: 59 species on 5%+ of 31 checklistsSep 1-7: 55 species on 5%+ of 22 checklistsSep 8-14: 49 species on 5%+ of 10 checklistsSep 15-21: low data (9 checklists)Sep 22-30: 79 species on 5%+ of 31 checklistsOct 1-7: 77 species on 5%+ of 16 checklistsOct 8-14: 78 species on 5%+ of 16 checklistsOct 15-21: 60 species on 5%+ of 24 checklistsOct 22-31: 75 species on 5%+ of 20 checklistsNov 1-7: 79 species on 5%+ of 17 checklistsNov 8-14: 67 species on 5%+ of 16 checklistsNov 15-21: 62 species on 5%+ of 13 checklistsNov 22-30: 75 species on 5%+ of 18 checklistsDec 1-7: 77 species on 5%+ of 16 checklistsDec 8-14: 54 species on 5%+ of 10 checklistsDec 15-21: 72 species on 5%+ of 17 checklistsDec 22-31: 70 species on 5%+ of 26 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
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. 1Mallard94%
  2. 2American Crow88%
  3. 3Cackling Goose88%
  4. 4Canada Goose84%
  5. 5Gadwall77%
  6. 6Great Blue Heron77%
  7. 7European Starling75%
  8. 8Double-crested Cormorant70%
  9. 9Common Merganser67%
  10. 10Song Sparrow58%
  11. 11Glaucous-winged Gull55%
  12. 12Belted Kingfisher53%
  13. 13Green-winged Teal53%
  14. 14Red-tailed Hawk53%
  15. 15Great Egret52%

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

Winter 70 species

  1. Mallard97%
  2. Canada Goose94%
  3. American Crow89%
  4. Cackling Goose88%
  5. Common Merganser85%

Spring 81 species

  1. Mallard96%
  2. Canada Goose94%
  3. American Crow93%
  4. Song Sparrow89%
  5. American Robin85%

Summer 63 species

  1. American Crow97%
  2. Mallard90%
  3. Great Blue Heron86%
  4. Barn Swallow81%
  5. Canada Goose72%

Fall 75 species

  1. Mallard92%
  2. American Crow86%
  3. Great Blue Heron85%
  4. Canada Goose76%
  5. European Starling69%

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.