Fall Birds in Colorado

Percent of complete checklists in Colorado that reported the bird during these weeks, 2016–2025 (297,513 checklists). It shows how likely you are to list the bird, not how many there are. Methods.

1. 1Northern Flicker44%
2. 2House Finch41%
3. 3Black-capped Chickadee39%
4. 4Black-billed Magpie35%
5. 5Mallard34%
6. 6Blue Jay31%
7. 7American Robin31%
8. 8American Crow29%
9. 9Canada Goose29%
10. 10Dark-eyed Junco23%
11. 11Red-winged Blackbird22%
12. 12Red-tailed Hawk22%
13. 13European Starling22%
14. 14Ring-billed Gull21%
15. 15White-crowned Sparrow19%
16. 16Eurasian Collared-Dove19%
17. 17White-breasted Nuthatch18%
18. 18Song Sparrow17%
19. 19American Goldfinch17%
20. 20Downy Woodpecker16%
21. 21Common Raven16%
22. 22Mountain Chickadee15%
23. 23American Coot14%
24. 24Spotted Towhee14%
25. 25Mourning Dove13%
26. 26Belted Kingfisher13%
27. 27Killdeer13%
28. 28Red-breasted Nuthatch12%
29. 29Great Blue Heron12%
30. 30Rock Pigeon12%
31. 31Gadwall12%
32. 32House Sparrow12%
33. 33Yellow-rumped Warbler12%
34. 34American Wigeon12%
35. 35Steller's Jay12%
36. 36Pied-billed Grebe11%
37. 37Double-crested Cormorant10%
38. 38American Kestrel10%

• Canada Goosefirst arrivals late October, peaks mid April
• Dark-eyed Juncofirst arrivals the second week of October, peaks the second week of December
• White-crowned Sparrowfirst arrivals late September, peaks the second week of October
• Common Goldeneyefirst arrivals late October, peaks the second week of January
• Cackling Goosefirst arrivals mid October, peaks early December
• American Cootfirst arrivals early October, peaks early November
• Buffleheadfirst arrivals the second week of October, peaks mid November
• Pied-billed Grebefirst arrivals late September, peaks late October
• Hooded Merganserfirst arrivals the second week of October, peaks late November
• Common Merganserfirst arrivals early September, peaks mid January
• Lesser Scaupfirst arrivals the second week of October, peaks early April
• Bald Eaglefirst arrivals late October, peaks early January

• Mourning Dovemost gone by the second week of September
• Broad-tailed Hummingbirdmost gone by the second week of September
• Northern Yellow Warblermost gone by early September
• Northern House Wrenmost gone by the second week of September
• Yellow-rumped Warblermost gone by late October
• White-crowned Sparrowmost gone by mid November
• Barn Swallowmost gone by late September
• American Goldfinchmost gone by the second week of September
• Wilson's Warblermost gone by early October
• Western Wood-Peweemost gone by the second week of September
• Say's Phoebemost gone by early October
• Western Kingbirdmost gone by early September

39. 39Woodhouse's Scrub-Jay9.5%
40. 40Wilson's Warbler8.9%
41. 41Barn Swallow8.9%
42. 42Northern Shoveler8.5%
43. 43Green-winged Teal8.3%
44. 44Lesser Goldfinch8.2%
45. 45Western Meadowlark8.1%
46. 46American White Pelican8.1%
47. 47Townsend's Solitaire8.0%
48. 48Chipping Sparrow7.9%
49. 49Western Grebe7.4%
50. 50Bufflehead7.1%
51. 51Pygmy Nuthatch7.0%
52. 52Bald Eagle6.8%
53. 53Say's Phoebe6.4%
54. 54Ring-necked Duck6.2%
55. 55Ruby-crowned Kinglet6.0%
56. 56Pine Siskin5.9%
57. 57Hairy Woodpecker5.8%
58. 58Turkey Vulture5.8%
59. 59Ruddy Duck5.7%
60. 60Broad-tailed Hummingbird5.6%