WhenToBird

Birding spot · Larimer County, Colorado

Birding at Old St. Louis Natural Area: What You'll See Each Week

In November, the birds most often reported at Old St. Louis Natural Area are Mallard (93%), Red-winged Blackbird (91%), and Belted Kingfisher (79%). It is busiest in spring, when 63 species turn up on at least 1 in 20 checklists, and species counts peak in early June (64 species). 138 species have been reported here across 934 complete checklists from 225 birders.

Species by week

020406080Jan 1-7: 46 species on 5%+ of 15 checklistsJan 8-14: 34 species on 5%+ of 44 checklistsJan 15-21: 34 species on 5%+ of 21 checklistsJan 22-31: 36 species on 5%+ of 45 checklistsFeb 1-7: 38 species on 5%+ of 48 checklistsFeb 8-14: 40 species on 5%+ of 47 checklistsFeb 15-21: 35 species on 5%+ of 44 checklistsFeb 22-28: 39 species on 5%+ of 33 checklistsMar 1-7: 41 species on 5%+ of 13 checklistsMar 8-14: low data (7 checklists)Mar 15-21: 44 species on 5%+ of 13 checklistsMar 22-31: 41 species on 5%+ of 27 checklistsApr 1-7: 38 species on 5%+ of 26 checklistsApr 8-14: 41 species on 5%+ of 25 checklistsApr 15-21: 55 species on 5%+ of 20 checklistsApr 22-30: 57 species on 5%+ of 33 checklistsMay 1-7: 53 species on 5%+ of 23 checklistsMay 8-14: 55 species on 5%+ of 22 checklistsMay 15-21: 58 species on 5%+ of 51 checklistsMay 22-31: 62 species on 5%+ of 34 checklistsJun 1-7: 64 species on 5%+ of 13 checklistsJun 8-14: low data (6 checklists)Jun 15-21: 60 species on 5%+ of 12 checklistsJun 22-30: 50 species on 5%+ of 14 checklistsJul 1-7: low data (9 checklists)Jul 8-14: low data (7 checklists)Jul 15-21: low data (5 checklists)Jul 22-31: 52 species on 5%+ of 12 checklistsAug 1-7: 51 species on 5%+ of 16 checklistsAug 8-14: 52 species on 5%+ of 13 checklistsAug 15-21: low data (7 checklists)Aug 22-31: 52 species on 5%+ of 13 checklistsSep 1-7: 63 species on 5%+ of 15 checklistsSep 8-14: 61 species on 5%+ of 20 checklistsSep 15-21: low data (8 checklists)Sep 22-30: 62 species on 5%+ of 17 checklistsOct 1-7: 42 species on 5%+ of 23 checklistsOct 8-14: 49 species on 5%+ of 17 checklistsOct 15-21: 43 species on 5%+ of 10 checklistsOct 22-31: 40 species on 5%+ of 18 checklistsNov 1-7: 44 species on 5%+ of 13 checklistsNov 8-14: 46 species on 5%+ of 15 checklistsNov 15-21: low data (6 checklists)Nov 22-30: low data (9 checklists)Dec 1-7: low data (9 checklists)Dec 8-14: 31 species on 5%+ of 10 checklistsDec 15-21: 39 species on 5%+ of 14 checklistsDec 22-31: 37 species on 5%+ of 12 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. 1Mallard93%
  2. 2Red-winged Blackbird91%
  3. 3Belted Kingfisher79%
  4. 4Blue Jay74%
  5. 5Northern Flicker74%
  6. 6Black-capped Chickadee72%
  7. 7Song Sparrow63%
  8. 8Virginia Rail60%
  9. 9American Goldfinch56%
  10. 10American Robin47%
  11. 11American Wigeon47%
  12. 12House Finch47%
  13. 13Green-winged Teal44%
  14. 14White-crowned Sparrow42%
  15. 15Red-tailed Hawk35%

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 42 species

  1. Mallard92%
  2. Red-winged Blackbird79%
  3. Black-capped Chickadee63%
  4. Northern Flicker58%
  5. American Wigeon54%

Spring 63 species

  1. Red-winged Blackbird97%
  2. Mallard93%
  3. Great Blue Heron86%
  4. American Robin71%
  5. Song Sparrow69%

Summer 56 species

  1. Red-winged Blackbird90%
  2. Blue Jay83%
  3. Mallard77%
  4. Mourning Dove75%
  5. Song Sparrow70%

Fall 53 species

  1. Blue Jay88%
  2. Red-winged Blackbird88%
  3. Mallard85%
  4. Northern Flicker79%
  5. Belted Kingfisher72%

Specialties

Birds reported far more often here than across Colorado.

  • Virginia Rail37% of checklists here vs 1.0% statewide: 38.2×
  • Sora16% of checklists here vs 0.7% statewide: 21.7×
  • Great Egret11% of checklists here vs 0.9% statewide: 13.1×
  • Northern Shrike5.5% of checklists here vs 0.6% statewide: 9.4×
  • Marsh Wren11% of checklists here vs 1.2% statewide: 9.2×
  • Cinnamon Teal24% of checklists here vs 3.1% statewide: 7.9×
  • Wood Duck19% of checklists here vs 2.6% statewide: 7.5×
  • Belted Kingfisher53% of checklists here vs 8.7% statewide: 6.1×

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.