Birds in Colorado in October

Percent of complete checklists in Colorado that reported the bird during these weeks, 2016–2025 (97,676 checklists). It shows how likely you are to list the bird, not how many there are. Methods.

1. 1Northern Flicker46%
2. 2House Finch44%
3. 3Black-billed Magpie39%
4. 4Black-capped Chickadee38%
5. 5Mallard34%
6. 6American Robin34%
7. 7Blue Jay34%
8. 8American Crow31%
9. 9White-crowned Sparrow29%
10. 10Dark-eyed Junco27%
11. 11Canada Goose26%
12. 12Red-winged Blackbird26%
13. 13Red-tailed Hawk23%
14. 14European Starling23%
15. 15Ring-billed Gull20%
16. 16Song Sparrow19%
17. 17Eurasian Collared-Dove18%
18. 18White-breasted Nuthatch17%
19. 19Common Raven17%
20. 20Yellow-rumped Warbler15%
21. 21Mountain Chickadee15%
22. 22Spotted Towhee15%
23. 23American Coot15%
24. 24Downy Woodpecker15%
25. 25Gadwall14%
26. 26American Wigeon13%
27. 27American Goldfinch13%
28. 28Pied-billed Grebe13%
29. 29Belted Kingfisher13%
30. 30House Sparrow13%
31. 31Rock Pigeon12%
32. 32Red-breasted Nuthatch12%
33. 33Killdeer12%
34. 34Steller's Jay12%
35. 35Great Blue Heron11%
36. 36Double-crested Cormorant11%
37. 37Townsend's Solitaire10%

• Canada Goosefirst arrivals late October, peaks mid April
• Dark-eyed Juncofirst arrivals the second week of October, peaks the second week of December
• 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
• Hooded Merganserfirst arrivals the second week of October, peaks late November
• Lesser Scaupfirst arrivals the second week of October, peaks early April
• Bald Eaglefirst arrivals late October, peaks early January
• American Tree Sparrowfirst arrivals mid October, peaks the second week of November
• Common Loonfirst arrivals mid October, peaks the second week of November
• American Herring Gullfirst arrivals early October, peaks mid November

• Yellow-rumped Warblermost gone by late October
• Wilson's Warblermost gone by early October
• Say's Phoebemost gone by early October
• Chipping Sparrowmost gone by the second week of October
• Lesser Goldfinchmost gone by early October
• Blue-winged Tealmost gone by mid October
• Turkey Vulturemost gone by early October
• Ospreymost gone by early October
• Snowy Egretmost gone by early October
• Vesper Sparrowmost gone by early October
• Orange-crowned Warblermost gone by mid October
• Mountain Bluebirdmost gone by late October

38. 38Woodhouse's Scrub-Jay10%
39. 39Western Meadowlark9.8%
40. 40Mourning Dove9.5%
41. 41American Kestrel9.4%
42. 42Green-winged Teal8.8%
43. 43Western Grebe8.8%
44. 44Ruby-crowned Kinglet8.7%
45. 45Northern Shoveler8.5%
46. 46American White Pelican8.3%
47. 47Pygmy Nuthatch7.3%
48. 48Ring-necked Duck6.9%
49. 49Ruddy Duck6.8%
50. 50Lesser Goldfinch6.6%
51. 51Bald Eagle6.5%
52. 52Common Grackle6.2%
53. 53Bufflehead6.0%
54. 54Mountain Bluebird5.7%
55. 55Pine Siskin5.7%
56. 56Hairy Woodpecker5.6%
57. 57Chipping Sparrow5.6%
58. 58Bushtit5.2%
59. 59Redhead5.1%
60. 60Northern Harrier4.9%