Birds in Colorado in April

Percent of complete checklists in Colorado that reported the bird during these weeks, 2016–2025 (154,431 checklists). It shows how likely you are to list the bird, not how many there are. Methods.

1. 1American Robin55%
2. 2Red-winged Blackbird49%
3. 3Mallard47%
4. 4Canada Goose43%
5. 5House Finch41%
6. 6Northern Flicker38%
7. 7European Starling32%
8. 8Black-capped Chickadee31%
9. 9Common Grackle29%
10. 10Western Meadowlark28%
11. 11American Crow28%
12. 12Black-billed Magpie28%
13. 13Mourning Dove26%
14. 14Eurasian Collared-Dove26%
15. 15Gadwall26%
16. 16Red-tailed Hawk25%
17. 17Song Sparrow24%
18. 18Killdeer23%
19. 19Say's Phoebe22%
20. 20Blue Jay20%
21. 21Great Blue Heron20%
22. 22Northern Shoveler20%
23. 23Double-crested Cormorant18%
24. 24American Coot18%
25. 25Common Raven16%
26. 26Green-winged Teal16%
27. 27Spotted Towhee16%
28. 28American Goldfinch16%
29. 29House Sparrow15%
30. 30Dark-eyed Junco15%
31. 31White-crowned Sparrow15%
32. 32Downy Woodpecker14%
33. 33Turkey Vulture14%
34. 34Yellow-rumped Warbler13%
35. 35Bufflehead13%
36. 36Lesser Scaup13%
37. 37Blue-winged Teal13%
38. 38American White Pelican12%
39. 39Rock Pigeon12%
40. 40Tree Swallow12%
41. 41American Kestrel12%
42. 42Cinnamon Teal12%
43. 43White-breasted Nuthatch11%
44. 44Barn Swallow11%
45. 45American Wigeon11%
46. 46Ring-billed Gull11%
47. 47Osprey11%

• Mourning Dovefirst arrivals mid April, peaks the second week of May
• Broad-tailed Hummingbirdfirst arrivals mid April, peaks late July
• Northern Yellow Warblerfirst arrivals late April, peaks late May
• Northern House Wrenfirst arrivals mid April, peaks mid May
• Barn Swallowfirst arrivals the second week of April, peaks late August
• Bullock's Oriolefirst arrivals late April, peaks mid May
• Brown-headed Cowbirdfirst arrivals the second week of April, peaks mid May
• Violet-green Swallowfirst arrivals the second week of April, peaks the second week of July
• Western Kingbirdfirst arrivals mid April, peaks late May
• Chipping Sparrowfirst arrivals the second week of April, peaks the second week of May
• Cliff Swallowfirst arrivals mid April, peaks late May
• Western Tanagerfirst arrivals late April, peaks late May

• Dark-eyed Juncomost gone by early April
• Ring-billed Gullmost gone by mid April
• Common Goldeneyemost gone by early April
• Hooded Mergansermost gone by the second week of April
• Common Mergansermost gone by late April
• Bald Eaglemost gone by late April
• Ring-necked Duckmost gone by late April
• Northern Pintailmost gone by late April
• Clark's Nutcrackermost gone by the second week of April
• Canvasbackmost gone by the second week of April
• Brown Creepermost gone by early April

48. 48Ring-necked Duck9.6%
49. 49Bald Eagle9.3%
50. 50Belted Kingfisher8.8%
51. 51Mountain Chickadee8.7%
52. 52American Avocet8.6%
53. 53Common Merganser8.5%
54. 54Ruddy Duck8.3%
55. 55Western Grebe7.5%
56. 56Bushtit7.5%
57. 57Pine Siskin7.3%
58. 58Red-breasted Nuthatch6.7%
59. 59Greater Yellowlegs6.7%
60. 60Mountain Bluebird6.4%