WhenToBird

Birding spot · Jefferson County, Colorado

Birding at Chatfield State Park (Massey Draw): What You'll See Each Week

In November, the birds most often reported at Chatfield State Park (Massey Draw) are Ring-billed Gull (82%), Mallard (58%), and Black-billed Magpie (44%). It is busiest in spring, when 48 species turn up on at least 1 in 20 checklists, and species counts peak in mid April (70 species). 124 species have been reported here across 932 complete checklists from 371 birders.

Species by week

020406080Jan 1-7: 27 species on 5%+ of 76 checklistsJan 8-14: 28 species on 5%+ of 14 checklistsJan 15-21: 28 species on 5%+ of 25 checklistsJan 22-31: 19 species on 5%+ of 51 checklistsFeb 1-7: 25 species on 5%+ of 12 checklistsFeb 8-14: 17 species on 5%+ of 21 checklistsFeb 15-21: low data (5 checklists)Feb 22-28: low data (4 checklists)Mar 1-7: low data (5 checklists)Mar 8-14: low data (4 checklists)Mar 15-21: low data (9 checklists)Mar 22-31: low data (8 checklists)Apr 1-7: low data (9 checklists)Apr 8-14: 48 species on 5%+ of 17 checklistsApr 15-21: 70 species on 5%+ of 16 checklistsApr 22-30: 49 species on 5%+ of 14 checklistsMay 1-7: low data (8 checklists)May 8-14: low data (5 checklists)May 15-21: low data (4 checklists)May 22-31: low data (5 checklists)Jun 1-7: low data (0 checklists)Jun 8-14: low data (2 checklists)Jun 15-21: low data (5 checklists)Jun 22-30: low data (1 checklists)Jul 1-7: low data (1 checklists)Jul 8-14: low data (0 checklists)Jul 15-21: low data (0 checklists)Jul 22-31: low data (1 checklists)Aug 1-7: low data (3 checklists)Aug 8-14: low data (3 checklists)Aug 15-21: low data (3 checklists)Aug 22-31: 33 species on 5%+ of 32 checklistsSep 1-7: 39 species on 5%+ of 40 checklistsSep 8-14: 35 species on 5%+ of 51 checklistsSep 15-21: 46 species on 5%+ of 71 checklistsSep 22-30: 31 species on 5%+ of 21 checklistsOct 1-7: 46 species on 5%+ of 16 checklistsOct 8-14: 27 species on 5%+ of 11 checklistsOct 15-21: 39 species on 5%+ of 16 checklistsOct 22-31: 45 species on 5%+ of 31 checklistsNov 1-7: 35 species on 5%+ of 18 checklistsNov 8-14: 24 species on 5%+ of 69 checklistsNov 15-21: 32 species on 5%+ of 26 checklistsNov 22-30: 31 species on 5%+ of 33 checklistsDec 1-7: 40 species on 5%+ of 19 checklistsDec 8-14: 25 species on 5%+ of 26 checklistsDec 15-21: 37 species on 5%+ of 40 checklistsDec 22-31: 29 species on 5%+ of 81 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 Gull82%
  2. 2Mallard58%
  3. 3Black-billed Magpie44%
  4. 4American Coot39%
  5. 5Canada Goose39%
  6. 6Common Goldeneye37%
  7. 7White-winged Scoter33%
  8. 8Western Grebe30%
  9. 9Common Loon23%
  10. 10Common Merganser23%
  11. 11Pacific Loon15%
  12. 12Pied-billed Grebe13%
  13. 13Red-tailed Hawk13%
  14. 14American Crow12%
  15. 15American White Pelican12%

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 30 species

  1. Common Goldeneye92%
  2. Ring-billed Gull86%
  3. Common Merganser63%
  4. Mallard44%
  5. Hooded Merganser43%

Spring 48 species

  1. Black-billed Magpie59%
  2. Western Meadowlark58%
  3. Ring-billed Gull48%
  4. Western Grebe38%
  5. Canada Goose37%

Summer 37 species

  1. Double-crested Cormorant71%
  2. Ring-billed Gull69%
  3. Black-billed Magpie47%
  4. American White Pelican43%
  5. Rock Wren41%

Fall 43 species

  1. Ring-billed Gull87%
  2. Mallard47%
  3. Double-crested Cormorant44%
  4. Black-billed Magpie43%
  5. Canada Goose32%

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.