WhenToBird

Birding spot · Denver County, Colorado

Birding at Heron Pond/Heller Open Space: What You'll See Each Week

In November, the birds most often reported at Heron Pond/Heller Open Space are Canada Goose (97%), Mallard (97%), and Hooded Merganser (91%). It is busiest in spring, when 73 species turn up on at least 1 in 20 checklists, and species counts peak in mid May (80 species). 161 species have been reported here across 924 complete checklists from 241 birders.

Species by week

020406080Jan 1-7: low data (6 checklists)Jan 8-14: 35 species on 5%+ of 10 checklistsJan 15-21: 38 species on 5%+ of 37 checklistsJan 22-31: 36 species on 5%+ of 26 checklistsFeb 1-7: low data (8 checklists)Feb 8-14: low data (2 checklists)Feb 15-21: low data (4 checklists)Feb 22-28: 30 species on 5%+ of 13 checklistsMar 1-7: low data (9 checklists)Mar 8-14: 41 species on 5%+ of 13 checklistsMar 15-21: 45 species on 5%+ of 17 checklistsMar 22-31: 38 species on 5%+ of 25 checklistsApr 1-7: 39 species on 5%+ of 21 checklistsApr 8-14: 51 species on 5%+ of 31 checklistsApr 15-21: 67 species on 5%+ of 39 checklistsApr 22-30: 64 species on 5%+ of 70 checklistsMay 1-7: 66 species on 5%+ of 41 checklistsMay 8-14: 70 species on 5%+ of 69 checklistsMay 15-21: 80 species on 5%+ of 79 checklistsMay 22-31: 63 species on 5%+ of 105 checklistsJun 1-7: low data (9 checklists)Jun 8-14: 43 species on 5%+ of 11 checklistsJun 15-21: low data (4 checklists)Jun 22-30: low data (4 checklists)Jul 1-7: 48 species on 5%+ of 10 checklistsJul 8-14: low data (4 checklists)Jul 15-21: low data (6 checklists)Jul 22-31: low data (4 checklists)Aug 1-7: low data (5 checklists)Aug 8-14: low data (7 checklists)Aug 15-21: low data (7 checklists)Aug 22-31: 59 species on 5%+ of 16 checklistsSep 1-7: 49 species on 5%+ of 42 checklistsSep 8-14: 61 species on 5%+ of 10 checklistsSep 15-21: low data (8 checklists)Sep 22-30: 57 species on 5%+ of 32 checklistsOct 1-7: 43 species on 5%+ of 29 checklistsOct 8-14: 50 species on 5%+ of 12 checklistsOct 15-21: 54 species on 5%+ of 11 checklistsOct 22-31: low data (8 checklists)Nov 1-7: 47 species on 5%+ of 13 checklistsNov 8-14: low data (8 checklists)Nov 15-21: low data (7 checklists)Nov 22-30: low data (6 checklists)Dec 1-7: low data (6 checklists)Dec 8-14: low data (5 checklists)Dec 15-21: low data (6 checklists)Dec 22-31: low data (9 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. 1Canada Goose97%
  2. 2Mallard97%
  3. 3Hooded Merganser91%
  4. 4European Starling82%
  5. 5Gadwall82%
  6. 6Ring-billed Gull82%
  7. 7Red-winged Blackbird79%
  8. 8Northern Shoveler76%
  9. 9Black-billed Magpie71%
  10. 10Great Blue Heron71%
  11. 11House Finch71%
  12. 12American Crow68%
  13. 13Rock Pigeon68%
  14. 14Song Sparrow62%
  15. 15White-crowned Sparrow59%

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 34 species

  1. Ring-billed Gull85%
  2. European Starling83%
  3. American Crow76%
  4. Canada Goose72%
  5. Black-billed Magpie69%

Spring 73 species

  1. Red-winged Blackbird97%
  2. European Starling89%
  3. Common Grackle83%
  4. American Robin79%
  5. Mallard79%

Summer 55 species

  1. European Starling87%
  2. Barn Swallow86%
  3. Red-winged Blackbird85%
  4. Common Grackle82%
  5. Mourning Dove82%

Fall 61 species

  1. Red-winged Blackbird77%
  2. Mallard76%
  3. European Starling75%
  4. Rock Pigeon74%
  5. House Finch74%

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.