WhenToBird

Birding spot · Adams County, Colorado

Birding at Trailhead Park: What You'll See Each Week

In November, the birds most often reported at Trailhead Park are Gadwall (99%), Green-winged Teal (96%), and Mallard (94%). It is busiest in spring, when 68 species turn up on at least 1 in 20 checklists, and species counts peak in the second week of November (71 species). 129 species have been reported here across 1,213 complete checklists from 545 birders.

Species by week

020406080Jan 1-7: 52 species on 5%+ of 82 checklistsJan 8-14: 57 species on 5%+ of 103 checklistsJan 15-21: 56 species on 5%+ of 93 checklistsJan 22-31: 52 species on 5%+ of 113 checklistsFeb 1-7: 57 species on 5%+ of 73 checklistsFeb 8-14: 56 species on 5%+ of 58 checklistsFeb 15-21: 53 species on 5%+ of 90 checklistsFeb 22-28: 53 species on 5%+ of 50 checklistsMar 1-7: 55 species on 5%+ of 32 checklistsMar 8-14: 51 species on 5%+ of 28 checklistsMar 15-21: 54 species on 5%+ of 25 checklistsMar 22-31: 57 species on 5%+ of 20 checklistsApr 1-7: 57 species on 5%+ of 15 checklistsApr 8-14: low data (9 checklists)Apr 15-21: low data (9 checklists)Apr 22-30: low data (5 checklists)May 1-7: low data (6 checklists)May 8-14: low data (4 checklists)May 15-21: low data (9 checklists)May 22-31: low data (8 checklists)Jun 1-7: low data (9 checklists)Jun 8-14: low data (6 checklists)Jun 15-21: low data (1 checklists)Jun 22-30: low data (1 checklists)Jul 1-7: low data (2 checklists)Jul 8-14: low data (3 checklists)Jul 15-21: low data (0 checklists)Jul 22-31: low data (4 checklists)Aug 1-7: low data (1 checklists)Aug 8-14: low data (4 checklists)Aug 15-21: low data (5 checklists)Aug 22-31: low data (3 checklists)Sep 1-7: low data (1 checklists)Sep 8-14: low data (4 checklists)Sep 15-21: low data (3 checklists)Sep 22-30: low data (8 checklists)Oct 1-7: low data (5 checklists)Oct 8-14: low data (4 checklists)Oct 15-21: low data (8 checklists)Oct 22-31: 53 species on 5%+ of 10 checklistsNov 1-7: 64 species on 5%+ of 17 checklistsNov 8-14: 71 species on 5%+ of 17 checklistsNov 15-21: 58 species on 5%+ of 18 checklistsNov 22-30: 60 species on 5%+ of 42 checklistsDec 1-7: 63 species on 5%+ of 38 checklistsDec 8-14: 56 species on 5%+ of 50 checklistsDec 15-21: 56 species on 5%+ of 38 checklistsDec 22-31: 56 species on 5%+ of 79 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. 1Gadwall99%
  2. 2Green-winged Teal96%
  3. 3Mallard94%
  4. 4Canada Goose86%
  5. 5Northern Shoveler86%
  6. 6Bufflehead79%
  7. 7Northern Pintail76%
  8. 8Common Goldeneye74%
  9. 9Ring-billed Gull74%
  10. 10Black-billed Magpie69%
  11. 11Belted Kingfisher66%
  12. 12Red-tailed Hawk66%
  13. 13Killdeer65%
  14. 14Song Sparrow65%
  15. 15Rock Pigeon64%

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 54 species

  1. Northern Shoveler98%
  2. Green-winged Teal97%
  3. Gadwall95%
  4. Common Goldeneye95%
  5. Mallard93%

Spring 68 species

  1. Canada Goose86%
  2. Mallard81%
  3. Gadwall77%
  4. European Starling75%
  5. Northern Shoveler72%

Summer 55 species

  1. Red-winged Blackbird77%
  2. Canada Goose67%
  3. Double-crested Cormorant67%
  4. Snowy Egret67%
  5. Mourning Dove64%

Fall 65 species

  1. Mallard96%
  2. Gadwall93%
  3. Green-winged Teal90%
  4. Canada Goose83%
  5. Ring-billed Gull75%

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.