WhenToBird

Birding spot · Denver County, Colorado

Birding at Marston Lake: What You'll See Each Week

In November, the birds most often reported at Marston Lake are Ring-billed Gull (74%), Bufflehead (74%), and Canada Goose (65%). It is busiest in spring, when 58 species turn up on at least 1 in 20 checklists, and species counts peak in late April (67 species). 146 species have been reported here across 1,558 complete checklists from 304 birders.

Species by week

020406080Jan 1-7: 40 species on 5%+ of 77 checklistsJan 8-14: 37 species on 5%+ of 34 checklistsJan 15-21: 41 species on 5%+ of 16 checklistsJan 22-31: 30 species on 5%+ of 12 checklistsFeb 1-7: low data (8 checklists)Feb 8-14: 31 species on 5%+ of 10 checklistsFeb 15-21: 33 species on 5%+ of 11 checklistsFeb 22-28: low data (8 checklists)Mar 1-7: 36 species on 5%+ of 15 checklistsMar 8-14: 38 species on 5%+ of 35 checklistsMar 15-21: 44 species on 5%+ of 31 checklistsMar 22-31: 49 species on 5%+ of 57 checklistsApr 1-7: 50 species on 5%+ of 61 checklistsApr 8-14: 52 species on 5%+ of 82 checklistsApr 15-21: 57 species on 5%+ of 93 checklistsApr 22-30: 67 species on 5%+ of 128 checklistsMay 1-7: 61 species on 5%+ of 62 checklistsMay 8-14: 45 species on 5%+ of 47 checklistsMay 15-21: 59 species on 5%+ of 54 checklistsMay 22-31: 54 species on 5%+ of 63 checklistsJun 1-7: 46 species on 5%+ of 35 checklistsJun 8-14: 40 species on 5%+ of 14 checklistsJun 15-21: 45 species on 5%+ of 17 checklistsJun 22-30: low data (8 checklists)Jul 1-7: low data (6 checklists)Jul 8-14: 37 species on 5%+ of 14 checklistsJul 15-21: 43 species on 5%+ of 10 checklistsJul 22-31: low data (6 checklists)Aug 1-7: low data (8 checklists)Aug 8-14: low data (4 checklists)Aug 15-21: low data (7 checklists)Aug 22-31: 51 species on 5%+ of 16 checklistsSep 1-7: 38 species on 5%+ of 11 checklistsSep 8-14: 60 species on 5%+ of 15 checklistsSep 15-21: 45 species on 5%+ of 17 checklistsSep 22-30: 62 species on 5%+ of 13 checklistsOct 1-7: 47 species on 5%+ of 10 checklistsOct 8-14: 37 species on 5%+ of 13 checklistsOct 15-21: 41 species on 5%+ of 22 checklistsOct 22-31: 47 species on 5%+ of 62 checklistsNov 1-7: 39 species on 5%+ of 46 checklistsNov 8-14: 42 species on 5%+ of 57 checklistsNov 15-21: 50 species on 5%+ of 32 checklistsNov 22-30: 40 species on 5%+ of 48 checklistsDec 1-7: 32 species on 5%+ of 30 checklistsDec 8-14: 39 species on 5%+ of 27 checklistsDec 15-21: 42 species on 5%+ of 38 checklistsDec 22-31: 40 species on 5%+ of 68 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 Gull74%
  2. 2Bufflehead74%
  3. 3Canada Goose65%
  4. 4Common Goldeneye58%
  5. 5Common Loon56%
  6. 6Western Grebe56%
  7. 7American Crow50%
  8. 8Hooded Merganser50%
  9. 9Mallard49%
  10. 10Common Merganser47%
  11. 11American Coot40%
  12. 12Pied-billed Grebe31%
  13. 13Black-billed Magpie31%
  14. 14Cackling Goose31%
  15. 15Rock Pigeon31%

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 41 species

  1. Ring-billed Gull88%
  2. Common Goldeneye69%
  3. Common Merganser65%
  4. Canada Goose64%
  5. Bufflehead59%

Spring 58 species

  1. Gadwall78%
  2. Mallard77%
  3. Ring-billed Gull77%
  4. American Crow56%
  5. Northern Shoveler53%

Summer 43 species

  1. Mallard82%
  2. Barn Swallow76%
  3. Double-crested Cormorant70%
  4. Ring-billed Gull61%
  5. Cliff Swallow54%

Fall 48 species

  1. Ring-billed Gull77%
  2. Western Grebe58%
  3. Mallard58%
  4. Canada Goose54%
  5. Common Loon50%

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.