WhenToBird

Birding spot · Marin County, California

Birding at Hamilton Wetlands: What You'll See Each Week

In November, the birds most often reported at Hamilton Wetlands are American Avocet (89%), Green-winged Teal (84%), and Northern Shoveler (83%). It is busiest in spring, when 105 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of December (121 species). 186 species have been reported here across 1,350 complete checklists from 422 birders.

Species by week

0255075100125Jan 1-7: 116 species on 5%+ of 38 checklistsJan 8-14: 95 species on 5%+ of 27 checklistsJan 15-21: 90 species on 5%+ of 25 checklistsJan 22-31: 102 species on 5%+ of 47 checklistsFeb 1-7: 111 species on 5%+ of 32 checklistsFeb 8-14: 120 species on 5%+ of 40 checklistsFeb 15-21: 102 species on 5%+ of 30 checklistsFeb 22-28: 106 species on 5%+ of 33 checklistsMar 1-7: 112 species on 5%+ of 15 checklistsMar 8-14: 103 species on 5%+ of 32 checklistsMar 15-21: 101 species on 5%+ of 26 checklistsMar 22-31: 105 species on 5%+ of 47 checklistsApr 1-7: 95 species on 5%+ of 24 checklistsApr 8-14: 118 species on 5%+ of 18 checklistsApr 15-21: 104 species on 5%+ of 29 checklistsApr 22-30: 99 species on 5%+ of 57 checklistsMay 1-7: 94 species on 5%+ of 23 checklistsMay 8-14: 112 species on 5%+ of 20 checklistsMay 15-21: 80 species on 5%+ of 23 checklistsMay 22-31: 81 species on 5%+ of 25 checklistsJun 1-7: 93 species on 5%+ of 15 checklistsJun 8-14: 91 species on 5%+ of 16 checklistsJun 15-21: 84 species on 5%+ of 15 checklistsJun 22-30: 86 species on 5%+ of 27 checklistsJul 1-7: 93 species on 5%+ of 20 checklistsJul 8-14: 69 species on 5%+ of 22 checklistsJul 15-21: 95 species on 5%+ of 20 checklistsJul 22-31: 80 species on 5%+ of 34 checklistsAug 1-7: 83 species on 5%+ of 28 checklistsAug 8-14: 82 species on 5%+ of 40 checklistsAug 15-21: 87 species on 5%+ of 15 checklistsAug 22-31: 83 species on 5%+ of 30 checklistsSep 1-7: 103 species on 5%+ of 34 checklistsSep 8-14: 93 species on 5%+ of 24 checklistsSep 15-21: 89 species on 5%+ of 24 checklistsSep 22-30: 106 species on 5%+ of 36 checklistsOct 1-7: 110 species on 5%+ of 19 checklistsOct 8-14: 106 species on 5%+ of 20 checklistsOct 15-21: 98 species on 5%+ of 31 checklistsOct 22-31: 93 species on 5%+ of 39 checklistsNov 1-7: 103 species on 5%+ of 32 checklistsNov 8-14: 99 species on 5%+ of 27 checklistsNov 15-21: 102 species on 5%+ of 32 checklistsNov 22-30: 101 species on 5%+ of 34 checklistsDec 1-7: 95 species on 5%+ of 22 checklistsDec 8-14: 121 species on 5%+ of 19 checklistsDec 15-21: 99 species on 5%+ of 17 checklistsDec 22-31: 97 species on 5%+ of 47 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. 1American Avocet89%
  2. 2Green-winged Teal84%
  3. 3Northern Shoveler83%
  4. 4Black-necked Stilt80%
  5. 5Greater Yellowlegs70%
  6. 6Least Sandpiper69%
  7. 7American Wigeon68%
  8. 8White-crowned Sparrow67%
  9. 9Say's Phoebe66%
  10. 10Willet66%
  11. 11Turkey Vulture65%
  12. 12Black-bellied Plover62%
  13. 13Killdeer61%
  14. 14Black Phoebe60%
  15. 15Marbled Godwit59%

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 103 species

  1. American Avocet90%
  2. Black-necked Stilt88%
  3. Northern Shoveler87%
  4. Green-winged Teal86%
  5. American Wigeon84%

Spring 105 species

  1. Red-winged Blackbird79%
  2. Tree Swallow78%
  3. Gadwall74%
  4. Mallard72%
  5. Turkey Vulture68%

Summer 86 species

  1. Great Egret85%
  2. Snowy Egret78%
  3. House Finch77%
  4. Black-necked Stilt73%
  5. Mallard69%

Fall 103 species

  1. American Avocet85%
  2. Black-necked Stilt79%
  3. Greater Yellowlegs75%
  4. Killdeer73%
  5. Great Egret70%

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.