Menu
The Cornell Lab
The Cornell Lab

The Cornell Lab of Ornithology builds the eBird global platform for communities and partners around the world to advance data-driven science, education, and conservation.

Change Region

Change Region

Weld

Map

Explore...

Bird List

Updated ~1 day ago
394 All Years 194 This Year 2024 117 This Month May 2024
Last Observed First Observed High Count

Custom Time Period

Change Time Period

Sort by

  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (116)

  1. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: David Fraide
    Location: Union Reservoir
  2. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Rachel Kolokoff Hopper
    Location: Crow Valley Recreation Area, Briggsdale US-CO 40.64399, -104.34118
  3. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  4. Redhead Aythya americana
    # Count: 9
    Date:
    Observer: Adrian Lakin
    Location: Wetland on Weld CR 46
  5. Bufflehead Bucephala albeola
    # Count: 6
    Date:
    Observer: Adrian Lakin
    Location: Wetland on Weld CR 46
  6. Virginia Rail Rallus limicola
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Lower Latham Reservoir area
  7. Sora Porzana carolina
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Lower Latham Reservoir area
  8. Marbled Godwit Limosa fedoa
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Lower Latham Reservoir area
  9. Pectoral Sandpiper Calidris melanotos
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Loloff Reservoir
  10. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 13
    Date:
    Observer: Cole Wild
    Location: Windsor Reservoir
  11. Forster's Tern Sterna forsteri
    # Count: 11
    Date:
    Observer: Cole Wild
    Location: Windsor Reservoir
  12. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Windsor Reservoir
  13. Green-winged Teal Anas crecca
    # Count: 6
    Date:
    Observer: Adrian Lakin
    Location: Weld CR 59 wetlands
  14. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: David Fraide
    Location: Baxter Lake
  15. Canvasback Aythya valisineria
    # Count: 2
    Date:
    Observer: Adrian Lakin
    Location: WTP at Weld CR's 62.5 and 51
  16. Black-necked Stilt Himantopus mexicanus
    # Count: 2
    Date:
    Observer: Adrian Lakin
    Location: WTP at Weld CR's 62.5 and 51
  17. Wilson's Phalarope Phalaropus tricolor
    # Count: 72
    Date:
    Observer: Adrian Lakin
    Location: WTP at Weld CR's 62.5 and 51
  18. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 5
    Date:
    Observer: Scott Rashid
    Location: County Road 16 1/2, Longmont US-CO 40.10917, -105.03735
  19. Wilson's Warbler Cardellina pusilla
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Norma's Grove
  20. Cassin's Kingbird Tyrannus vociferans
    # Count: 1
    Date:
    Observer: Scott Rashid
    Location: 8129 County Road 21, Fort Lupton US-CO 40.12281, -104.86747
  21. Black-billed Magpie Pica hudsonia
    # Count: 1
    Date:
    Observer: Scott Rashid
    Location: 8129 County Road 21, Fort Lupton US-CO 40.12281, -104.86747
  22. Wild Turkey Meleagris gallopavo
    # Count: 2
    Date:
    Observer: carl starace
    Location: Sandstone Ranch
  23. Great Horned Owl Bubo virginianus
    # Count: 3
    Date:
    Observer: carl starace
    Location: Sandstone Ranch
  24. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 1
    Date:
    Observer: carl starace
    Location: Sandstone Ranch
  25. Marsh Wren Cistothorus palustris
    # Count: 1
    Date:
    Observer: carl starace
    Location: Sandstone Ranch
  26. Black-capped Chickadee Poecile atricapillus
    # Count: 3
    Date:
    Observer: Jeff Percell
    Location: Percell Backyard, Northridge, Erie, Colorado, US (40.065, -105.042)
  27. Bushtit Psaltriparus minimus
    # Count: 1
    Date:
    Observer: Jeff Percell
    Location: Percell Backyard, Northridge, Erie, Colorado, US (40.065, -105.042)
  28. Semipalmated Sandpiper Calidris pusilla
    # Count: 3
    Date:
    Observer: John Vanderpoel
    Location: Union Reservoir
  29. Franklin's Gull Leucophaeus pipixcan
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Union Reservoir
  30. Ring-billed Gull Larus delawarensis
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Union Reservoir
  31. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: John Vanderpoel
    Location: Union Reservoir
  32. Loggerhead Shrike Lanius ludovicianus
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Norma's Grove
  33. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Norma's Grove
  34. Rock Wren Salpinctes obsoletus
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Norma's Grove
  35. Least Flycatcher Empidonax minimus
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Crow Valley CG
  36. Lazuli Bunting Passerina amoena
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Crow Valley CG
  37. Cinnamon Teal Spatula cyanoptera
    # Count: 2
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  38. Horned Grebe Podiceps auritus
    # Count: 1
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  39. Rock Pigeon Columba livia
    # Count: 3
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  40. Baird's Sandpiper Calidris bairdii
    # Count: 1
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  41. Western Sandpiper Calidris mauri
    # Count: 1
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  42. Caspian Tern Hydroprogne caspia
    # Count: 3
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  43. Tree Swallow Tachycineta bicolor
    # Count: 4
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  44. Great-tailed Grackle Quiscalus mexicanus
    # Count: 3
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  45. Vesper Sparrow Pooecetes gramineus
    # Count: 5
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG Bird Tour—Stops 5-8
  46. Northern Shoveler Spatula clypeata
    # Count: 30
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  47. Gadwall Mareca strepera
    # Count: 25
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  48. American Wigeon Mareca americana
    # Count: 2
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  49. Lesser Scaup Aythya affinis
    # Count: 20
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  50. Ruddy Duck Oxyura jamaicensis
    # Count: 8
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  51. American Coot Fulica americana
    # Count: 7
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  52. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  53. Lesser Yellowlegs Tringa flavipes
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  54. Willet Tringa semipalmata
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  55. White-faced Ibis Plegadis chihi
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  56. Bank Swallow Riparia riparia
    # Count: 4
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  57. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 2
    Date:
    Observer: Adrian Lakin
    Location: Pawnee NG--Adams and Bunker Reservoir Number 1
  58. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG Bird Tour--Stops 1-4 and Murphy's Pasture
  59. House Finch Haemorhous mexicanus
    # Count: 1
    Date:
    Observer: Caleb Stewart
    Location: Toru
  60. Orange-crowned Warbler Leiothlypis celata
    # Count: 2
    Date:
    Observer: Joey Angstman
    Location: Angstman Residence
  61. Lark Bunting Calamospiza melanocorys
    # Count: 4
    Date:
    Observer: Adrian Lakin
    Location: Weld County Road 136, Grover, Colorado, US (40.974, -104.034)
  62. Double-crested Cormorant Nannopterum auritum
    # Count: 1
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  63. Great Blue Heron Ardea herodias
    # Count: 2
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  64. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  65. American Crow Corvus brachyrhynchos
    # Count: 1
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  66. Barn Swallow Hirundo rustica
    # Count: 50
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  67. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: 1
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  68. Bullock's Oriole Icterus bullockii
    # Count: 1
    Date:
    Observer: Willa Weimer
    Location: Poudre Learning Center
  69. Horned Lark Eremophila alpestris
    # Count: 5
    Date:
    Observer: Adrian Lakin
    Location: County Road 134, Grover, Colorado, US (40.961, -103.991)
  70. Thick-billed Longspur Rhynchophanes mccownii
    # Count: 2
    Date:
    Observer: Adrian Lakin
    Location: County Road 134, Grover, Colorado, US (40.961, -103.991)
  71. Grasshopper Sparrow Ammodramus savannarum
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: County Road 134, Grover, Colorado, US (40.961, -103.991)
  72. Canada Goose Branta canadensis
    # Count: 2
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  73. Blue-winged Teal Spatula discors
    # Count: 6
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  74. Mallard Anas platyrhynchos
    # Count: 1
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  75. Eared Grebe Podiceps nigricollis
    # Count: 18
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  76. Western Grebe Aechmophorus occidentalis
    # Count: 43
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  77. American Avocet Recurvirostra americana
    # Count: 1
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  78. Killdeer Charadrius vociferus
    # Count: 2
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  79. Spotted Sandpiper Actitis macularius
    # Count: 1
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  80. Least Sandpiper Calidris minutilla
    # Count: 2
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  81. American White Pelican Pelecanus erythrorhynchos
    # Count: 14
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  82. Osprey Pandion haliaetus
    # Count: 2
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  83. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: Jay Hutchins
    Location: Union Reservoir
  84. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 3
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  85. Mourning Dove Zenaida macroura
    # Count: 30
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  86. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  87. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  88. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  89. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  90. Northern Flicker Colaptes auratus
    # Count: 2
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  91. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  92. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  93. Western Kingbird Tyrannus verticalis
    # Count: 8
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  94. Blue Jay Cyanocitta cristata
    # Count: 7
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  95. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  96. House Wren Troglodytes aedon
    # Count: 10
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  97. European Starling Sturnus vulgaris
    # Count: 9
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  98. Brown Thrasher Toxostoma rufum
    # Count: 6
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  99. Northern Mockingbird Mimus polyglottos
    # Count: 2
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  100. American Robin Turdus migratorius
    # Count: 15
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  101. House Sparrow Passer domesticus
    # Count: 5
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  102. Pine Siskin Spinus pinus
    # Count: 2
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  103. American Goldfinch Spinus tristis
    # Count: 6
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  104. Chipping Sparrow Spizella passerina
    # Count: 10
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  105. Clay-colored Sparrow Spizella pallida
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  106. Brewer's Sparrow Spizella breweri
    # Count: 2
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  107. Lark Sparrow Chondestes grammacus
    # Count: 11
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  108. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 35
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  109. Lincoln's Sparrow Melospiza lincolnii
    # Count: 3
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  110. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  111. Spotted Towhee Pipilo maculatus
    # Count: 2
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  112. Western Meadowlark Sturnella neglecta
    # Count: 8
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  113. Red-winged Blackbird Agelaius phoeniceus
    # Count: 5
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  114. Brown-headed Cowbird Molothrus ater
    # Count: 9
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  115. Common Grackle Quiscalus quiscula
    # Count: 75
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG
  116. Yellow-rumped Warbler Setophaga coronata
    # Count: 16
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG

Exotic: Provisional (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: 1
    Date:
    Observer: carl starace
    Location: Sandstone Ranch

Additional Taxa (2)

  1. swallow sp. Hirundinidae sp.
    # Count: 100
    Date:
    Observer: Bill Prather
    Location: Union Reservoir
  2. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Grant Medlin
    Location: Pawnee NG--Crow Valley CG