WhenToBird

Birding spot · Washington County, Colorado

Birding at Prewitt Reservoir State Wildlife Area: What You'll See Each Week

In November, the birds most often reported at Prewitt Reservoir State Wildlife Area are Ring-billed Gull (84%), Snow Goose (76%), and Canada Goose (65%). It is busiest in fall, when 105 species turn up on at least 1 in 20 checklists, and species counts peak in mid August (122 species). 230 species have been reported here across 957 complete checklists from 511 birders.

Species by week

0255075100125Jan 1-7: low data (3 checklists)Jan 8-14: low data (6 checklists)Jan 15-21: low data (6 checklists)Jan 22-31: low data (4 checklists)Feb 1-7: low data (1 checklists)Feb 8-14: low data (1 checklists)Feb 15-21: low data (7 checklists)Feb 22-28: low data (7 checklists)Mar 1-7: 45 species on 5%+ of 12 checklistsMar 8-14: low data (7 checklists)Mar 15-21: 69 species on 5%+ of 13 checklistsMar 22-31: 56 species on 5%+ of 21 checklistsApr 1-7: 66 species on 5%+ of 13 checklistsApr 8-14: 43 species on 5%+ of 21 checklistsApr 15-21: 69 species on 5%+ of 10 checklistsApr 22-30: 105 species on 5%+ of 11 checklistsMay 1-7: 96 species on 5%+ of 12 checklistsMay 8-14: 105 species on 5%+ of 13 checklistsMay 15-21: 94 species on 5%+ of 28 checklistsMay 22-31: 90 species on 5%+ of 31 checklistsJun 1-7: 81 species on 5%+ of 15 checklistsJun 8-14: low data (3 checklists)Jun 15-21: low data (5 checklists)Jun 22-30: 62 species on 5%+ of 10 checklistsJul 1-7: low data (6 checklists)Jul 8-14: low data (2 checklists)Jul 15-21: 92 species on 5%+ of 14 checklistsJul 22-31: 83 species on 5%+ of 33 checklistsAug 1-7: 82 species on 5%+ of 30 checklistsAug 8-14: 94 species on 5%+ of 17 checklistsAug 15-21: 122 species on 5%+ of 19 checklistsAug 22-31: 106 species on 5%+ of 140 checklistsSep 1-7: 103 species on 5%+ of 112 checklistsSep 8-14: 102 species on 5%+ of 71 checklistsSep 15-21: 107 species on 5%+ of 57 checklistsSep 22-30: 89 species on 5%+ of 67 checklistsOct 1-7: 88 species on 5%+ of 31 checklistsOct 8-14: 100 species on 5%+ of 17 checklistsOct 15-21: 100 species on 5%+ of 16 checklistsOct 22-31: low data (8 checklists)Nov 1-7: 92 species on 5%+ of 12 checklistsNov 8-14: low data (9 checklists)Nov 15-21: low data (9 checklists)Nov 22-30: low data (7 checklists)Dec 1-7: low data (4 checklists)Dec 8-14: low data (9 checklists)Dec 15-21: low data (3 checklists)Dec 22-31: low data (4 checklists)JanFebMarAprMayJunJulAugSepOctNovDec
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. 1Ring-billed Gull84%
  2. 2Snow Goose76%
  3. 3Canada Goose65%
  4. 4American Herring Gull62%
  5. 5American White Pelican62%
  6. 6Bald Eagle62%
  7. 7Northern Flicker62%
  8. 8Cackling Goose57%
  9. 9Mallard57%
  10. 10Ross's Goose54%
  11. 11Western Grebe51%
  12. 12Blue Jay49%
  13. 13Red-tailed Hawk46%
  14. 14Double-crested Cormorant43%
  15. 15European Starling41%

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 55 species

  1. Bald Eagle84%
  2. Northern Flicker58%
  3. Canada Goose55%
  4. Ring-billed Gull55%
  5. Snow Goose49%

Spring 98 species

  1. American White Pelican87%
  2. Canada Goose82%
  3. Red-winged Blackbird79%
  4. Killdeer62%
  5. American Robin61%

Summer 99 species

  1. American White Pelican93%
  2. Killdeer87%
  3. Great Blue Heron85%
  4. Ring-billed Gull82%
  5. Franklin's Gull78%

Fall 105 species

  1. Ring-billed Gull87%
  2. American White Pelican86%
  3. Great Blue Heron82%
  4. Killdeer78%
  5. Franklin's Gull66%

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.