WhenToBird

Birding spot · Larimer County, Colorado

Birding at Fossil Creek Reservoir Natural Area: What You'll See Each Week

In November, the birds most often reported at Fossil Creek Reservoir Natural Area are Mallard (94%), Northern Shoveler (91%), and Canada Goose (84%). It is busiest in spring, when 75 species turn up on at least 1 in 20 checklists, and species counts peak in early September (85 species). 192 species have been reported here across 1,582 complete checklists from 613 birders.

Species by week

020406080100Jan 1-7: 38 species on 5%+ of 23 checklistsJan 8-14: 59 species on 5%+ of 20 checklistsJan 15-21: 49 species on 5%+ of 20 checklistsJan 22-31: 32 species on 5%+ of 23 checklistsFeb 1-7: 44 species on 5%+ of 18 checklistsFeb 8-14: 44 species on 5%+ of 26 checklistsFeb 15-21: 47 species on 5%+ of 31 checklistsFeb 22-28: 45 species on 5%+ of 21 checklistsMar 1-7: 45 species on 5%+ of 23 checklistsMar 8-14: 49 species on 5%+ of 46 checklistsMar 15-21: 55 species on 5%+ of 34 checklistsMar 22-31: 50 species on 5%+ of 52 checklistsApr 1-7: 59 species on 5%+ of 40 checklistsApr 8-14: 60 species on 5%+ of 49 checklistsApr 15-21: 65 species on 5%+ of 41 checklistsApr 22-30: 77 species on 5%+ of 33 checklistsMay 1-7: 67 species on 5%+ of 27 checklistsMay 8-14: 74 species on 5%+ of 33 checklistsMay 15-21: 65 species on 5%+ of 28 checklistsMay 22-31: 81 species on 5%+ of 38 checklistsJun 1-7: 74 species on 5%+ of 15 checklistsJun 8-14: 64 species on 5%+ of 14 checklistsJun 15-21: 59 species on 5%+ of 30 checklistsJun 22-30: 64 species on 5%+ of 31 checklistsJul 1-7: 73 species on 5%+ of 19 checklistsJul 8-14: 74 species on 5%+ of 20 checklistsJul 15-21: 62 species on 5%+ of 12 checklistsJul 22-31: 69 species on 5%+ of 33 checklistsAug 1-7: 73 species on 5%+ of 45 checklistsAug 8-14: 72 species on 5%+ of 34 checklistsAug 15-21: 59 species on 5%+ of 26 checklistsAug 22-31: 75 species on 5%+ of 31 checklistsSep 1-7: 85 species on 5%+ of 36 checklistsSep 8-14: 69 species on 5%+ of 23 checklistsSep 15-21: 76 species on 5%+ of 41 checklistsSep 22-30: 78 species on 5%+ of 40 checklistsOct 1-7: 70 species on 5%+ of 23 checklistsOct 8-14: 84 species on 5%+ of 20 checklistsOct 15-21: 60 species on 5%+ of 25 checklistsOct 22-31: 66 species on 5%+ of 73 checklistsNov 1-7: 67 species on 5%+ of 58 checklistsNov 8-14: 62 species on 5%+ of 34 checklistsNov 15-21: 62 species on 5%+ of 65 checklistsNov 22-30: 53 species on 5%+ of 70 checklistsDec 1-7: 53 species on 5%+ of 40 checklistsDec 8-14: 53 species on 5%+ of 32 checklistsDec 15-21: 41 species on 5%+ of 28 checklistsDec 22-31: 51 species on 5%+ of 38 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. 2Northern Shoveler91%
  3. 3Canada Goose84%
  4. 4Bufflehead80%
  5. 5Ring-billed Gull78%
  6. 6Common Goldeneye76%
  7. 7Common Merganser73%
  8. 8Green-winged Teal65%
  9. 9Red-tailed Hawk63%
  10. 10Cackling Goose61%
  11. 11Gadwall57%
  12. 12American Wigeon53%
  13. 13American Coot52%
  14. 14Bald Eagle51%
  15. 15Western Grebe48%

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 46 species

  1. Mallard86%
  2. Northern Shoveler83%
  3. Common Goldeneye80%
  4. Common Merganser75%
  5. Canada Goose75%

Spring 75 species

  1. Western Meadowlark89%
  2. Mallard78%
  3. Gadwall73%
  4. American Coot72%
  5. American Robin72%

Summer 70 species

  1. Barn Swallow96%
  2. Western Grebe89%
  3. Canada Goose84%
  4. Double-crested Cormorant81%
  5. Mallard79%

Fall 74 species

  1. Mallard89%
  2. Canada Goose85%
  3. Ring-billed Gull82%
  4. Northern Shoveler68%
  5. Western Grebe67%

Specialties

Birds reported far more often here than across Colorado.

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.