WhenToBird

Birding spot · Delta County, Colorado

Birding at Sweitzer Lake State Park: What You'll See Each Week

In November, the birds most often reported at Sweitzer Lake State Park are American Coot (94%), Song Sparrow (65%), and White-crowned Sparrow (65%). It is busiest in spring, when 85 species turn up on at least 1 in 20 checklists, and species counts peak in late April (88 species). 162 species have been reported here across 852 complete checklists from 254 birders.

Species by week

020406080100Jan 1-7: 38 species on 5%+ of 11 checklistsJan 8-14: low data (8 checklists)Jan 15-21: 36 species on 5%+ of 13 checklistsJan 22-31: low data (7 checklists)Feb 1-7: low data (6 checklists)Feb 8-14: 57 species on 5%+ of 14 checklistsFeb 15-21: 49 species on 5%+ of 12 checklistsFeb 22-28: 44 species on 5%+ of 27 checklistsMar 1-7: 46 species on 5%+ of 25 checklistsMar 8-14: 55 species on 5%+ of 19 checklistsMar 15-21: 53 species on 5%+ of 18 checklistsMar 22-31: 54 species on 5%+ of 36 checklistsApr 1-7: 59 species on 5%+ of 31 checklistsApr 8-14: 71 species on 5%+ of 38 checklistsApr 15-21: 80 species on 5%+ of 59 checklistsApr 22-30: 88 species on 5%+ of 58 checklistsMay 1-7: 81 species on 5%+ of 25 checklistsMay 8-14: 69 species on 5%+ of 24 checklistsMay 15-21: 68 species on 5%+ of 14 checklistsMay 22-31: 71 species on 5%+ of 31 checklistsJun 1-7: 62 species on 5%+ of 17 checklistsJun 8-14: 50 species on 5%+ of 24 checklistsJun 15-21: 56 species on 5%+ of 15 checklistsJun 22-30: 60 species on 5%+ of 13 checklistsJul 1-7: low data (9 checklists)Jul 8-14: low data (7 checklists)Jul 15-21: low data (6 checklists)Jul 22-31: 58 species on 5%+ of 13 checklistsAug 1-7: low data (7 checklists)Aug 8-14: low data (9 checklists)Aug 15-21: low data (6 checklists)Aug 22-31: 59 species on 5%+ of 13 checklistsSep 1-7: low data (5 checklists)Sep 8-14: low data (9 checklists)Sep 15-21: 76 species on 5%+ of 13 checklistsSep 22-30: 71 species on 5%+ of 15 checklistsOct 1-7: 73 species on 5%+ of 27 checklistsOct 8-14: 70 species on 5%+ of 20 checklistsOct 15-21: 72 species on 5%+ of 19 checklistsOct 22-31: 81 species on 5%+ of 20 checklistsNov 1-7: 77 species on 5%+ of 18 checklistsNov 8-14: 79 species on 5%+ of 20 checklistsNov 15-21: 52 species on 5%+ of 13 checklistsNov 22-30: 57 species on 5%+ of 14 checklistsDec 1-7: 54 species on 5%+ of 12 checklistsDec 8-14: low data (8 checklists)Dec 15-21: 37 species on 5%+ of 12 checklistsDec 22-31: 36 species on 5%+ of 12 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 Coot94%
  2. 2Song Sparrow65%
  3. 3White-crowned Sparrow65%
  4. 4Dark-eyed Junco63%
  5. 5Mountain Bluebird63%
  6. 6Red-winged Blackbird60%
  7. 7Pied-billed Grebe58%
  8. 8Canada Goose54%
  9. 9Mallard51%
  10. 10European Starling49%
  11. 11House Finch49%
  12. 12American Wigeon46%
  13. 13Northern Flicker45%
  14. 14Western Grebe43%
  15. 15Northern Harrier42%

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 43 species

  1. Canada Goose80%
  2. American Coot75%
  3. Song Sparrow61%
  4. Common Merganser58%
  5. Dark-eyed Junco46%

Spring 85 species

  1. American Coot86%
  2. Canada Goose80%
  3. Marsh Wren67%
  4. Red-winged Blackbird66%
  5. Western Grebe65%

Summer 61 species

  1. Mourning Dove76%
  2. Red-winged Blackbird71%
  3. Western Grebe60%
  4. Canada Goose55%
  5. Marsh Wren51%

Fall 79 species

  1. American Coot89%
  2. Red-winged Blackbird62%
  3. White-crowned Sparrow61%
  4. Pied-billed Grebe58%
  5. Song Sparrow58%

Specialties

Birds reported far more often here than across Colorado.

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.