WhenToBird

Birding spot · San Diego County, California

Birding at Tijuana Slough National Wildlife Refuge (Oneonta Slough): What You'll See Each Week

In November, the birds most often reported at Tijuana Slough National Wildlife Refuge (Oneonta Slough) are Willet (82%), Brown Pelican (76%), and Marbled Godwit (71%). It is busiest in winter, when 84 species turn up on at least 1 in 20 checklists, and species counts peak in mid December (93 species). 171 species have been reported here across 2,555 complete checklists from 1,392 birders.

Species by week

020406080100Jan 1-7: 86 species on 5%+ of 54 checklistsJan 8-14: 89 species on 5%+ of 56 checklistsJan 15-21: 69 species on 5%+ of 47 checklistsJan 22-31: 80 species on 5%+ of 87 checklistsFeb 1-7: 73 species on 5%+ of 44 checklistsFeb 8-14: 76 species on 5%+ of 50 checklistsFeb 15-21: 82 species on 5%+ of 64 checklistsFeb 22-28: 82 species on 5%+ of 82 checklistsMar 1-7: 74 species on 5%+ of 93 checklistsMar 8-14: 76 species on 5%+ of 57 checklistsMar 15-21: 72 species on 5%+ of 63 checklistsMar 22-31: 80 species on 5%+ of 88 checklistsApr 1-7: 65 species on 5%+ of 62 checklistsApr 8-14: 71 species on 5%+ of 34 checklistsApr 15-21: 72 species on 5%+ of 36 checklistsApr 22-30: 64 species on 5%+ of 59 checklistsMay 1-7: 61 species on 5%+ of 37 checklistsMay 8-14: 64 species on 5%+ of 50 checklistsMay 15-21: 53 species on 5%+ of 28 checklistsMay 22-31: 58 species on 5%+ of 33 checklistsJun 1-7: 52 species on 5%+ of 25 checklistsJun 8-14: 51 species on 5%+ of 43 checklistsJun 15-21: 53 species on 5%+ of 54 checklistsJun 22-30: 53 species on 5%+ of 57 checklistsJul 1-7: 54 species on 5%+ of 48 checklistsJul 8-14: 51 species on 5%+ of 44 checklistsJul 15-21: 55 species on 5%+ of 49 checklistsJul 22-31: 57 species on 5%+ of 73 checklistsAug 1-7: 55 species on 5%+ of 47 checklistsAug 8-14: 58 species on 5%+ of 46 checklistsAug 15-21: 63 species on 5%+ of 59 checklistsAug 22-31: 65 species on 5%+ of 97 checklistsSep 1-7: 65 species on 5%+ of 59 checklistsSep 8-14: 67 species on 5%+ of 87 checklistsSep 15-21: 60 species on 5%+ of 46 checklistsSep 22-30: 63 species on 5%+ of 48 checklistsOct 1-7: 60 species on 5%+ of 27 checklistsOct 8-14: 75 species on 5%+ of 37 checklistsOct 15-21: 74 species on 5%+ of 15 checklistsOct 22-31: 79 species on 5%+ of 39 checklistsNov 1-7: 87 species on 5%+ of 40 checklistsNov 8-14: 78 species on 5%+ of 34 checklistsNov 15-21: 79 species on 5%+ of 47 checklistsNov 22-30: 79 species on 5%+ of 91 checklistsDec 1-7: 75 species on 5%+ of 41 checklistsDec 8-14: 80 species on 5%+ of 40 checklistsDec 15-21: 93 species on 5%+ of 55 checklistsDec 22-31: 81 species on 5%+ of 83 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. 1Willet82%
  2. 2Brown Pelican76%
  3. 3Marbled Godwit71%
  4. 4Long-billed Curlew68%
  5. 5Western Gull67%
  6. 6Great Egret66%
  7. 7Double-crested Cormorant65%
  8. 8Snowy Egret58%
  9. 9Say's Phoebe58%
  10. 10Bufflehead57%
  11. 11Hudsonian Whimbrel56%
  12. 12Northern Harrier56%
  13. 13Black-bellied Plover52%
  14. 14Surf Scoter52%
  15. 15Sanderling47%

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 84 species

  1. Willet85%
  2. American Wigeon74%
  3. Marbled Godwit74%
  4. Great Egret68%
  5. Brown Pelican66%

Spring 78 species

  1. Brown Pelican83%
  2. Willet83%
  3. Western Gull70%
  4. Double-crested Cormorant63%
  5. Snowy Plover62%

Summer 55 species

  1. Brown Pelican91%
  2. Western Gull82%
  3. Snowy Egret79%
  4. Willet79%
  5. Double-crested Cormorant76%

Fall 81 species

  1. Willet88%
  2. Brown Pelican81%
  3. Marbled Godwit72%
  4. Western Gull71%
  5. Double-crested Cormorant70%

Specialties

Birds reported far more often here than across California.

  • Gull-billed Tern15% of checklists here vs 0.1% statewide: 162.6×
  • Cocos Booby5.1% of checklists here vs 0.1% statewide: 155.0×
  • Pacific Golden-Plover10% of checklists here vs 0.1% statewide: 90.4×
  • Yellow-crowned Night Heron33% of checklists here vs 0.5% statewide: 59.7×
  • Snowy Plover49% of checklists here vs 1.1% statewide: 45.4×
  • Little Blue Heron18% of checklists here vs 0.4% statewide: 40.9×
  • Ridgway's Rail21% of checklists here vs 0.6% statewide: 34.4×
  • Least Tern20% of checklists here vs 0.6% statewide: 33.3×

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.