Birds in Colorado in May

Percent of complete checklists in Colorado that reported the bird during these weeks, 2016–2025 (187,054 checklists). It shows how likely you are to list the bird, not how many there are. Methods.

1. 1American Robin62%
2. 2Red-winged Blackbird50%
3. 3House Finch44%
4. 4Mourning Dove44%
5. 5Mallard39%
6. 6Common Grackle35%
7. 7Northern House Wren35%
8. 8Northern Flicker34%
9. 9Canada Goose34%
10. 10European Starling34%
11. 11Northern Yellow Warbler31%
12. 12Black-capped Chickadee30%
13. 13Barn Swallow29%
14. 14Western Meadowlark28%
15. 15Black-billed Magpie28%
16. 16Eurasian Collared-Dove27%
17. 17Broad-tailed Hummingbird26%
18. 18Blue Jay26%
19. 19Yellow-rumped Warbler25%
20. 20Spotted Towhee25%
21. 21Song Sparrow25%
22. 22American Goldfinch24%
23. 23Brown-headed Cowbird24%
24. 24American Crow23%
25. 25Bullock's Oriole23%
26. 26Red-tailed Hawk22%
27. 27Western Kingbird21%
28. 28Killdeer19%
29. 29Great Blue Heron19%
30. 30Chipping Sparrow19%
31. 31Tree Swallow19%
32. 32Violet-green Swallow18%
33. 33Double-crested Cormorant18%
34. 34Say's Phoebe18%
35. 35House Sparrow18%
36. 36Common Raven16%
37. 37Cliff Swallow16%
38. 38Turkey Vulture16%
39. 39Downy Woodpecker16%
40. 40Spotted Sandpiper13%
41. 41Western Tanager13%
42. 42White-breasted Nuthatch12%
43. 43Black-headed Grosbeak12%
44. 44American White Pelican12%
45. 45White-crowned Sparrow12%
46. 46Western Wood-Pewee12%
47. 47Gadwall11%
48. 48Pine Siskin11%
49. 49Northern Rough-winged Swallow10%
50. 50Rock Pigeon10%

• Wilson's Warblerfirst arrivals early May, peaks the second week of September
• Western Wood-Peweefirst arrivals the second week of May, peaks early June
• Western Warbling Vireofirst arrivals early May, peaks mid June
• Western Flycatcherfirst arrivals mid May, peaks the second week of July
• Pine Siskinfirst arrivals early May, peaks mid July
• Gray Catbirdfirst arrivals early May, peaks late May
• Yellow-breasted Chatfirst arrivals early May, peaks late May
• Eastern Kingbirdfirst arrivals early May, peaks late May
• Swainson's Thrushfirst arrivals early May, peaks mid May
• Blue Grosbeakfirst arrivals the second week of May, peaks the second week of August
• Plumbeous Vireofirst arrivals early May, peaks late May
• Clark's Nutcrackerfirst arrivals mid May, peaks late August

• Canada Goosemost gone by mid May
• Gadwallmost gone by mid May
• Northern Shovelermost gone by the second week of May
• Green-winged Tealmost gone by the second week of May
• American Wigeonmost gone by early May
• Buffleheadmost gone by early May
• Lesser Scaupmost gone by early May
• Cinnamon Tealmost gone by late May
• Redheadmost gone by mid May
• Greater Yellowlegsmost gone by the second week of May
• Cooper's Hawkmost gone by mid May
• Franklin's Gullmost gone by mid May

51. 51Blue-winged Teal9.9%
52. 52Lark Sparrow9.7%
53. 53Gray Catbird9.5%
54. 54Common Yellowthroat9.0%
55. 55Mountain Chickadee8.8%
56. 56Osprey8.6%
57. 57American Kestrel8.5%
58. 58American Coot8.3%
59. 59Black-chinned Hummingbird8.2%
60. 60Swainson's Hawk8.0%