WhenToBird

Birding spot · Larimer County, Colorado

Birding at Timnath Reservoir: What You'll See Each Week

In November, the birds most often reported at Timnath Reservoir are Ring-billed Gull (84%), Canada Goose (77%), and Mallard (65%). It is busiest in fall, when 103 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of September (104 species). 222 species have been reported here across 1,723 complete checklists from 498 birders.

Species by week

0255075100125Jan 1-7: low data (5 checklists)Jan 8-14: 43 species on 5%+ of 10 checklistsJan 15-21: low data (5 checklists)Jan 22-31: 30 species on 5%+ of 10 checklistsFeb 1-7: low data (8 checklists)Feb 8-14: 49 species on 5%+ of 15 checklistsFeb 15-21: 32 species on 5%+ of 10 checklistsFeb 22-28: 51 species on 5%+ of 13 checklistsMar 1-7: 56 species on 5%+ of 13 checklistsMar 8-14: 59 species on 5%+ of 20 checklistsMar 15-21: low data (8 checklists)Mar 22-31: 65 species on 5%+ of 13 checklistsApr 1-7: 66 species on 5%+ of 15 checklistsApr 8-14: 65 species on 5%+ of 14 checklistsApr 15-21: 65 species on 5%+ of 12 checklistsApr 22-30: 70 species on 5%+ of 14 checklistsMay 1-7: low data (5 checklists)May 8-14: low data (5 checklists)May 15-21: low data (3 checklists)May 22-31: 73 species on 5%+ of 11 checklistsJun 1-7: low data (6 checklists)Jun 8-14: low data (3 checklists)Jun 15-21: low data (6 checklists)Jun 22-30: low data (4 checklists)Jul 1-7: low data (3 checklists)Jul 8-14: low data (3 checklists)Jul 15-21: 92 species on 5%+ of 18 checklistsJul 22-31: 88 species on 5%+ of 32 checklistsAug 1-7: 88 species on 5%+ of 50 checklistsAug 8-14: 87 species on 5%+ of 106 checklistsAug 15-21: 97 species on 5%+ of 85 checklistsAug 22-31: 92 species on 5%+ of 169 checklistsSep 1-7: 98 species on 5%+ of 116 checklistsSep 8-14: 104 species on 5%+ of 139 checklistsSep 15-21: 99 species on 5%+ of 106 checklistsSep 22-30: 85 species on 5%+ of 123 checklistsOct 1-7: 81 species on 5%+ of 89 checklistsOct 8-14: 84 species on 5%+ of 67 checklistsOct 15-21: 74 species on 5%+ of 56 checklistsOct 22-31: 76 species on 5%+ of 57 checklistsNov 1-7: 70 species on 5%+ of 64 checklistsNov 8-14: 65 species on 5%+ of 87 checklistsNov 15-21: 57 species on 5%+ of 31 checklistsNov 22-30: 55 species on 5%+ of 41 checklistsDec 1-7: 54 species on 5%+ of 15 checklistsDec 8-14: 48 species on 5%+ of 13 checklistsDec 15-21: low data (9 checklists)Dec 22-31: 48 species on 5%+ of 16 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. 1Ring-billed Gull84%
  2. 2Canada Goose77%
  3. 3Mallard65%
  4. 4Cackling Goose63%
  5. 5Green-winged Teal62%
  6. 6California Gull61%
  7. 7American Herring Gull56%
  8. 8Common Merganser48%
  9. 9Red-winged Blackbird46%
  10. 10Red-tailed Hawk44%
  11. 11Killdeer43%
  12. 12Western Grebe41%
  13. 13Northern Pintail39%
  14. 14Horned Lark38%
  15. 15Northern Shoveler37%

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 47 species

  1. Canada Goose75%
  2. Cackling Goose71%
  3. Mallard71%
  4. Bald Eagle58%
  5. Northern Pintail54%

Spring 66 species

  1. Mallard83%
  2. Canada Goose79%
  3. Red-winged Blackbird73%
  4. Western Meadowlark68%
  5. Killdeer62%

Summer 96 species

  1. Great Blue Heron92%
  2. Killdeer92%
  3. American White Pelican91%
  4. Double-crested Cormorant91%
  5. Canada Goose88%

Fall 103 species

  1. Ring-billed Gull89%
  2. Canada Goose84%
  3. Killdeer79%
  4. American White Pelican73%
  5. Double-crested Cormorant72%

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.