WhenToBird

Birding spot · Jefferson County, Colorado

Birding at Casto Creek: What You'll See Each Week

In November, the birds most often reported at Casto Creek are Mountain Chickadee (88%), American Robin (73%), and Dark-eyed Junco (68%). It is busiest in summer, when 57 species turn up on at least 1 in 20 checklists, and species counts peak in early August (61 species). 116 species have been reported here across 1,275 complete checklists from 373 birders.

Species by week

020406080Jan 1-7: low data (9 checklists)Jan 8-14: low data (8 checklists)Jan 15-21: low data (5 checklists)Jan 22-31: low data (3 checklists)Feb 1-7: low data (5 checklists)Feb 8-14: low data (3 checklists)Feb 15-21: low data (7 checklists)Feb 22-28: low data (5 checklists)Mar 1-7: low data (8 checklists)Mar 8-14: low data (7 checklists)Mar 15-21: low data (7 checklists)Mar 22-31: 33 species on 5%+ of 17 checklistsApr 1-7: 31 species on 5%+ of 14 checklistsApr 8-14: 32 species on 5%+ of 25 checklistsApr 15-21: 36 species on 5%+ of 20 checklistsApr 22-30: 36 species on 5%+ of 37 checklistsMay 1-7: 36 species on 5%+ of 22 checklistsMay 8-14: 44 species on 5%+ of 36 checklistsMay 15-21: 50 species on 5%+ of 68 checklistsMay 22-31: 52 species on 5%+ of 70 checklistsJun 1-7: 55 species on 5%+ of 51 checklistsJun 8-14: 58 species on 5%+ of 71 checklistsJun 15-21: 59 species on 5%+ of 54 checklistsJun 22-30: 52 species on 5%+ of 65 checklistsJul 1-7: 54 species on 5%+ of 76 checklistsJul 8-14: 54 species on 5%+ of 71 checklistsJul 15-21: 51 species on 5%+ of 61 checklistsJul 22-31: 54 species on 5%+ of 51 checklistsAug 1-7: 61 species on 5%+ of 52 checklistsAug 8-14: 60 species on 5%+ of 45 checklistsAug 15-21: 51 species on 5%+ of 50 checklistsAug 22-31: 51 species on 5%+ of 50 checklistsSep 1-7: 39 species on 5%+ of 26 checklistsSep 8-14: 53 species on 5%+ of 20 checklistsSep 15-21: 43 species on 5%+ of 18 checklistsSep 22-30: 37 species on 5%+ of 27 checklistsOct 1-7: 38 species on 5%+ of 16 checklistsOct 8-14: 33 species on 5%+ of 18 checklistsOct 15-21: 28 species on 5%+ of 17 checklistsOct 22-31: 21 species on 5%+ of 13 checklistsNov 1-7: low data (9 checklists)Nov 8-14: low data (7 checklists)Nov 15-21: low data (9 checklists)Nov 22-30: low data (4 checklists)Dec 1-7: low data (2 checklists)Dec 8-14: low data (5 checklists)Dec 15-21: low data (5 checklists)Dec 22-31: low data (6 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. 1Mountain Chickadee88%
  2. 2American Robin73%
  3. 3Dark-eyed Junco68%
  4. 4Steller's Jay65%
  5. 5Broad-tailed Hummingbird63%
  6. 6White-breasted Nuthatch58%
  7. 7Common Raven55%
  8. 8Northern Flicker53%
  9. 9Pygmy Nuthatch53%
  10. 10Ruby-crowned Kinglet52%
  11. 11Northern House Wren50%
  12. 12Violet-green Swallow49%
  13. 13Hairy Woodpecker47%
  14. 14Pine Siskin45%
  15. 15Red-winged Blackbird45%

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 18 species

  1. Mountain Chickadee84%
  2. Common Raven67%
  3. Pygmy Nuthatch67%
  4. White-breasted Nuthatch49%
  5. Northern Shrike32%

Spring 49 species

  1. American Robin85%
  2. Mountain Chickadee84%
  3. Dark-eyed Junco67%
  4. Steller's Jay67%
  5. Common Raven61%

Summer 57 species

  1. Broad-tailed Hummingbird90%
  2. Mountain Chickadee89%
  3. American Robin86%
  4. Violet-green Swallow74%
  5. Northern House Wren73%

Fall 38 species

  1. Mountain Chickadee94%
  2. Steller's Jay86%
  3. Dark-eyed Junco74%
  4. Pygmy Nuthatch63%
  5. Common Raven62%

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.