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Rocky Mountain Arsenal NWR--Lake Ladora

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Bird List

Updated ~6 seconds ago
236 All Years 146 This Year 2025 133 This Month Apr 2025
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (235)

  1. Canada Goose Branta canadensis
    # Count: 18
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  2. Blue-winged Teal Spatula discors
    # Count: 6
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  3. Cinnamon Teal Spatula cyanoptera
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  4. Northern Shoveler Spatula clypeata
    # Count: 14
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  5. Gadwall Mareca strepera
    # Count: 18
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  6. Mallard Anas platyrhynchos
    # Count: 6
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  7. Ring-necked Duck Aythya collaris
    # Count: 4
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  8. Lesser Scaup Aythya affinis
    # Count: 8
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  9. Bufflehead Bucephala albeola
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  10. Ruddy Duck Oxyura jamaicensis
    # Count: 14
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  11. Rock Pigeon Columba livia
    # Count: 7
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  12. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  13. Mourning Dove Zenaida macroura
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  14. Virginia Rail Rallus limicola
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  15. Sora Porzana carolina
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  16. American Coot Fulica americana
    # Count: 18
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  17. Black-necked Stilt Himantopus mexicanus
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  18. Killdeer Charadrius vociferus
    # Count: 7
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  19. Marbled Godwit Limosa fedoa
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  20. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  21. Wilson's Snipe Gallinago delicata
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  22. Spotted Sandpiper Actitis macularius
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  23. Solitary Sandpiper Tringa solitaria
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  24. Least Sandpiper Calidris minutilla
    # Count: 11
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  25. Western Sandpiper Calidris mauri
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  26. Semipalmated Sandpiper Calidris pusilla
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  27. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  28. Double-crested Cormorant Nannopterum auritum
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  29. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  30. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  31. Black-billed Magpie Pica hudsonia
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  32. American Crow Corvus brachyrhynchos
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  33. Barn Swallow Hirundo rustica
    # Count: 30
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  34. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 10
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  35. European Starling Sturnus vulgaris
    # Count: 10
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  36. American Robin Turdus migratorius
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  37. American Goldfinch Spinus tristis
    # Count: 12
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  38. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 4
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  39. Vesper Sparrow Pooecetes gramineus
    # Count: 2
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  40. Song Sparrow Melospiza melodia
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  41. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: 4
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  42. Western Meadowlark Sturnella neglecta
    # Count: 5
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  43. Red-winged Blackbird Agelaius phoeniceus
    # Count: 30
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  44. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  45. Common Grackle Quiscalus quiscula
    # Count: 6
    Date:
    Observer: Christopher B 🦆
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  46. Green-winged Teal Anas crecca
    # Count: 2
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  47. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  48. Baird's Sandpiper Calidris bairdii
    # Count: 3
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  49. Western Grebe Aechmophorus occidentalis
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  50. White-faced Ibis Plegadis chihi
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  51. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  52. Blue Jay Cyanocitta cristata
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  53. Tree Swallow Tachycineta bicolor
    # Count: 10
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  54. Marsh Wren Cistothorus palustris
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  55. American Pipit Anthus rubescens
    # Count: 10
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  56. Spotted Towhee Pipilo maculatus
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  57. Brown-headed Cowbird Molothrus ater
    # Count: 2
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  58. Common Yellowthroat Geothlypis trichas
    # Count: 2
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  59. Willet Tringa semipalmata
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  60. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  61. Snowy Egret Egretta thula
    # Count: 1
    Date:
    Observer: Colin Woolley
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  62. Ring-billed Gull Larus delawarensis
    # Count: 1
    Date:
    Observer: Evan Wilder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  63. Great-tailed Grackle Quiscalus mexicanus
    # Count: 1
    Date:
    Observer: Helen Berkman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  64. Lesser Yellowlegs Tringa flavipes
    # Count: 2
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  65. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  66. Yellow Warbler Setophaga petechia
    # Count: 1
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  67. Yellow-rumped Warbler Setophaga coronata
    # Count: 1
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  68. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: Jennifer Mercer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  69. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 2
    Date:
    Observer: Jennifer Mercer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  70. Northern House Wren Troglodytes aedon
    # Count: 1
    Date:
    Observer: Jennifer Mercer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  71. House Sparrow Passer domesticus
    # Count: X
    Date:
    Observer: Jennifer Mercer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  72. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  73. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Christopher Holden
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  74. Black-capped Chickadee Poecile atricapillus
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  75. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Brian Danforth
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  76. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Brian Danforth
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  77. Redhead Aythya americana
    # Count: 1
    Date:
    Observer: Leanne Presley
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  78. Hooded Merganser Lophodytes cucullatus
    # Count: 6
    Date:
    Observer: Leanne Presley
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  79. American White Pelican Pelecanus erythrorhynchos
    # Count: 12
    Date:
    Observer: Leanne Presley
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  80. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Katie Bates
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  81. Horned Lark Eremophila alpestris
    # Count: 1
    Date:
    Observer: Ryan Gannon
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  82. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 2
    Date:
    Observer: Bryce Thompson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  83. Great Egret Ardea alba
    # Count: 2
    Date:
    Observer: Bryce Thompson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  84. Rock Wren Salpinctes obsoletus
    # Count: 1
    Date:
    Observer: Bryce Thompson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  85. Common Merganser Mergus merganser
    # Count: 1
    Date:
    Observer: Jean Olson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  86. Eared Grebe Podiceps nigricollis
    # Count: 4
    Date:
    Observer: Jean Olson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  87. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  88. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  89. House Finch Haemorhous mexicanus
    # Count: 6
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  90. Lesser Goldfinch Spinus psaltria
    # Count: 2
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  91. Savannah Sparrow Passerculus sandwichensis
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  92. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  93. Western Kingbird Tyrannus verticalis
    # Count: 2
    Date:
    Observer: Matt Blaze
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  94. Horned Grebe Podiceps auritus
    # Count: 2
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  95. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  96. Franklin's Gull Leucophaeus pipixcan
    # Count: 6
    Date:
    Observer: Karen Henderson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  97. Turkey Vulture Cathartes aura
    # Count: 5
    Date:
    Observer: Karen Henderson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  98. Eastern Phoebe Sayornis phoebe
    # Count: 1
    Date:
    Observer: Karen Henderson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  99. Loggerhead Shrike Lanius ludovicianus
    # Count: 1
    Date:
    Observer: Karen Henderson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  100. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  101. Cooper's Hawk Astur cooperii
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  102. Ferruginous Hawk Buteo regalis
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  103. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Laura Nelson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  104. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Laura Nelson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  105. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Erica Schaffer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  106. Wild Turkey Meleagris gallopavo
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  107. Wilson's Phalarope Phalaropus tricolor
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  108. Great Horned Owl Bubo virginianus
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  109. Northern Pintail Anas acuta
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  110. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  111. American Avocet Recurvirostra americana
    # Count: 3
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  112. Sage Thrasher Oreoscoptes montanus
    # Count: 1
    Date:
    Observer: Carly Crow
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  113. Common Goldeneye Bucephala clangula
    # Count: 1
    Date:
    Observer: Norm Lewis
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  114. Chipping Sparrow Spizella passerina
    # Count: 2
    Date:
    Observer: Joseph Caruso
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  115. Greater Scaup Aythya marila
    # Count: 2
    Date:
    Observer: Jeremy Nichols
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  116. Violet-green Swallow Tachycineta thalassina
    # Count: 10
    Date:
    Observer: Garrett Carlson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  117. Golden-crowned Kinglet Regulus satrapa
    # Count: 1
    Date:
    Observer: Garrett Carlson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  118. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: 1
    Date:
    Observer: Garrett Carlson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  119. Townsend's Solitaire Myadestes townsendi
    # Count: 1
    Date:
    Observer: Amy Walsh
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  120. Semipalmated Plover Charadrius semipalmatus
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  121. Mountain Bluebird Sialia currucoides
    # Count: 2
    Date:
    Observer: Eric Hynes
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  122. Canvasback Aythya valisineria
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  123. American Wigeon Mareca americana
    # Count: 3
    Date:
    Observer: Brian Genge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  124. Dark-eyed Junco Junco hyemalis
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  125. Caspian Tern Hydroprogne caspia
    # Count: 1
    Date:
    Observer: Todd Deininger
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  126. Wood Duck Aix sponsa
    # Count: 2
    Date:
    Observer: Gilberto Camargo Tietjen
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  127. Cedar Waxwing Bombycilla cedrorum
    # Count: 1
    Date:
    Observer: Allen Hendrick 1+864.360.5468
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  128. California Gull Larus californicus
    # Count: 2
    Date:
    Observer: Greg Harrington
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  129. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  130. Golden Eagle Aquila chrysaetos
    # Count: 1
    Date:
    Observer: LEO SNEAD
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  131. American Herring Gull Larus smithsonianus
    # Count: 1
    Date:
    Observer: Lesly B
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  132. Long-billed Curlew Numenius americanus
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  133. Prairie Falcon Falco mexicanus
    # Count: 1
    Date:
    Observer: Bill Eisele
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  134. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Greg Osland
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  135. Cackling Goose Branta hutchinsii
    # Count: 2
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  136. Bank Swallow Riparia riparia
    # Count: 1
    Date:
    Observer: Charles Thornton-Kolbe
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  137. Red-breasted Merganser Mergus serrator
    # Count: 2
    Date:
    Observer: Lily Pad
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  138. Bushtit Psaltriparus minimus
    # Count: 3
    Date:
    Observer: Russell Clayshulte
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  139. Lesser Black-backed Gull Larus fuscus
    # Count: 1
    Date:
    Observer: Christopher Curwen
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  140. American Tree Sparrow Spizelloides arborea
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  141. Mountain Chickadee Poecile gambeli
    # Count: 1
    Date:
    Observer: Les Barstow
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  142. Northern Shrike Lanius borealis
    # Count: 1
    Date:
    Observer: Owen Robertson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  143. Red-breasted Nuthatch Sitta canadensis
    # Count: 2
    Date:
    Observer: Tabetha Madsen
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  144. Barrow's Goldeneye Bucephala islandica
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  145. Rough-legged Hawk Buteo lagopus
    # Count: 1
    Date:
    Observer: Brian Johnson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  146. Swamp Sparrow Melospiza georgiana
    # Count: 1
    Date:
    Observer: Chris Petrizzo
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  147. Sandhill Crane Antigone canadensis
    # Count: 7
    Date:
    Observer: Gregg Hitchings
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  148. Common Loon Gavia immer
    # Count: 4
    Date:
    Observer: Patrick Collins
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  149. Tundra Swan Cygnus columbianus
    # Count: 1
    Date:
    Observer: Mark Pryshlak
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  150. Surf Scoter Melanitta perspicillata
    # Count: 1
    Date:
    Observer: Colin Woolley
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  151. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: Julia Johnson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  152. Snow Goose Anser caerulescens
    # Count: 1
    Date:
    Observer: Gregg Hitchings
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  153. Winter Wren Troglodytes hiemalis
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  154. Red-necked Grebe Podiceps grisegena
    # Count: 1
    Date:
    Observer: Carly Crow
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  155. Field Sparrow Spizella pusilla
    # Count: 1
    Date:
    Observer: Ryan Corda🦉
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  156. Scarlet Tanager Piranga olivacea
    # Count: 1
    Date:
    Observer: Norman Erthal
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  157. Brown Thrasher Toxostoma rufum
    # Count: 1
    Date:
    Observer: Grant Wiest
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  158. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: Stephen Sears
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  159. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Joseph Rojas
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  160. Gray Catbird Dumetella carolinensis
    # Count: 1
    Date:
    Observer: Sharon Kelly
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  161. Lincoln's Sparrow Melospiza lincolnii
    # Count: 1
    Date:
    Observer: Sharon Kelly
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  162. White-throated Sparrow Zonotrichia albicollis
    # Count: 1
    Date:
    Observer: Monte Tarbox
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  163. Clay-colored Sparrow Spizella pallida
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  164. Nashville Warbler Leiothlypis ruficapilla
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  165. Brewer's Sparrow Spizella breweri
    # Count: 1
    Date:
    Observer: Mike Webster
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  166. Wilson's Warbler Cardellina pusilla
    # Count: 1
    Date:
    Observer: Coen Kliewer
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  167. Lark Sparrow Chondestes grammacus
    # Count: 1
    Date:
    Observer: John Peckham
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  168. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Lisa B
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  169. Northern Mockingbird Mimus polyglottos
    # Count: 1
    Date:
    Observer: Jody Joyce
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  170. Willow Flycatcher Empidonax traillii
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  171. Dusky Flycatcher Empidonax oberholseri
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  172. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  173. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  174. Virginia's Warbler Leiothlypis virginiae
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  175. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 2
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  176. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  177. Blue Grosbeak Passerina caerulea
    # Count: 2
    Date:
    Observer: Charlie Chase
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  178. Cassin's Kingbird Tyrannus vociferans
    # Count: 1
    Date:
    Observer: Doug Holder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  179. Sabine's Gull Xema sabini
    # Count: 1
    Date:
    Observer: John Arthur
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  180. Common Nighthawk Chordeiles minor
    # Count: 2
    Date:
    Observer: Kurt Buzard
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  181. Broad-tailed Hummingbird Selasphorus platycercus
    # Count: 1
    Date:
    Observer: Matt Fyfe
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  182. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Matt Fyfe
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  183. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  184. Lark Bunting Calamospiza melanocorys
    # Count: 4
    Date:
    Observer: L Pera
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  185. Plumbeous Vireo Vireo plumbeus
    # Count: 1
    Date:
    Observer: Kathy Miller
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  186. Eastern Kingbird Tyrannus tyrannus
    # Count: 1
    Date:
    Observer: John Arthur
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  187. Northern Waterthrush Parkesia noveboracensis
    # Count: 1
    Date:
    Observer: Emily S
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  188. Gray Flycatcher Empidonax wrightii
    # Count: 1
    Date:
    Observer: David Suddjian
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  189. Western Cattle-Egret Ardea ibis
    # Count: 1
    Date:
    Observer: David Provencher
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  190. Black-chinned Hummingbird Archilochus alexandri
    # Count: 1
    Date:
    Observer: David Provencher
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  191. Least Flycatcher Empidonax minimus
    # Count: 1
    Date:
    Observer: Meg Reck
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  192. Red-necked Phalarope Phalaropus lobatus
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  193. Pectoral Sandpiper Calidris melanotos
    # Count: 1
    Date:
    Observer: Dave Prentice
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  194. Forster's Tern Sterna forsteri
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  195. Grasshopper Sparrow Ammodramus savannarum
    # Count: 2
    Date:
    Observer: Peter Monson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  196. Red-headed Woodpecker Melanerpes erythrocephalus
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  197. Bullock's Oriole Icterus bullockii
    # Count: 2
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  198. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: Milko Gervet
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  199. Yellow-breasted Chat Icteria virens
    # Count: 4
    Date:
    Observer: Kathy Ford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  200. Orchard Oriole Icterus spurius
    # Count: 1
    Date:
    Observer: Kelly Wilbar
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  201. White-winged Dove Zenaida asiatica
    # Count: 1
    Date:
    Observer: Stephanie Miller
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  202. Mississippi Kite Ictinia mississippiensis
    # Count: 1
    Date:
    Observer: Adam Kaningher
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  203. Lazuli Bunting Passerina amoena
    # Count: 1
    Date:
    Observer: Andrew Schmalfuss
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  204. White-rumped Sandpiper Calidris fuscicollis
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  205. Stilt Sandpiper Calidris himantopus
    # Count: 12
    Date:
    Observer: Isaac Boardman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  206. Olive-sided Flycatcher Contopus cooperi
    # Count: 1
    Date:
    Observer: Michael Gilbertson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  207. Black-and-white Warbler Mniotilta varia
    # Count: 1
    Date:
    Observer: Michael Gilbertson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  208. Clark's Grebe Aechmophorus clarkii
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  209. Harris's Sparrow Zonotrichia querula
    # Count: 1
    Date:
    Observer: Lark BenDaniel
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  210. Broad-winged Hawk Buteo platypterus
    # Count: 1
    Date:
    Observer: Trenton Voytko
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  211. Greater White-fronted Goose Anser albifrons
    # Count: 1
    Date:
    Observer: JAMES CARTER
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  212. Black Scoter Melanitta americana
    # Count: 1
    Date:
    Observer: Steve Ryder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  213. Ross's Goose Anser rossii
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  214. Lapland Longspur Calcarius lapponicus
    # Count: 1
    Date:
    Observer: Matthew Hall
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  215. Pacific Loon Gavia pacifica
    # Count: 1
    Date:
    Observer: David Drews
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  216. Indigo Bunting Passerina cyanea
    # Count: 1
    Date:
    Observer: Alex Kessock
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  217. Dickcissel Spiza americana
    # Count: 1
    Date:
    Observer: Buzz Schaumberg
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  218. Baltimore Oriole Icterus galbula
    # Count: 1
    Date:
    Observer: Carr Dorr
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  219. Black Tern Chlidonias niger
    # Count: 1
    Date:
    Observer: Jack Robinson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  220. Sanderling Calidris alba
    # Count: 1
    Date:
    Observer: George Ho
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  221. Glossy Ibis Plegadis falcinellus
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  222. Laughing Gull Leucophaeus atricilla
    # Count: 1
    Date:
    Observer: Adam Vesely
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  223. Common Poorwill Phalaenoptilus nuttallii
    # Count: 1
    Date:
    Observer: Michael Filosa
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  224. Chimney Swift Chaetura pelagica
    # Count: 1
    Date:
    Observer: John Chanin
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  225. Black-bellied Plover Pluvialis squatarola
    # Count: 1
    Date:
    Observer: Craig Dahl
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  226. Whimbrel Numenius phaeopus
    # Count: 1
    Date:
    Observer: Christine Alexander
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  227. Blackpoll Warbler Setophaga striata
    # Count: 1
    Date:
    Observer: Susan Rosine
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  228. Brown Creeper Certhia americana
    # Count: 1
    Date:
    Observer: Hannah Criswell
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  229. Glaucous Gull Larus hyperboreus
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  230. Long-tailed Duck Clangula hyemalis
    # Count: 1
    Date:
    Observer: Sofia Prado-Irwin
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  231. Cassin's Sparrow Peucaea cassinii
    # Count: 2
    Date:
    Observer: Graham Ray
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  232. Rusty Blackbird Euphagus carolinus
    # Count: 3
    Date:
    Observer: Laura Steadman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  233. Eastern Meadowlark Sturnella magna
    # Count: 1
    Date:
    Observer: Jeff Dawson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  234. Hammond's Flycatcher Empidonax hammondii
    # Count: X
    Date:
    Observer: Brian Johnson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  235. Trumpeter Swan Cygnus buccinator
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Rocky Mountain Arsenal NWR--Lake Ladora

Exotic: Provisional (1)

  1. Ring-necked Pheasant Phasianus colchicus
    # Count: 1
    Date:
    Observer: Joseph Caruso
    Location: Rocky Mountain Arsenal NWR--Lake Ladora

Hybrids (3)

  1. Bufflehead x Common Goldeneye (hybrid) Bucephala albeola x clangula
    # Count: 1
    Date:
    Observer: Carly Crow
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  2. Snow/Ross's x Cackling/Canada Goose (hybrid) Anser caerulescens/rossii x Branta hutchinsii/canadensis
    # Count: 1
    Date:
    Observer: Graham Ray
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  3. Gadwall x Northern Pintail (hybrid) Mareca strepera x Anas acuta
    # Count: 1
    Date:
    Observer: Jason Newton
    Location: Rocky Mountain Arsenal NWR--Lake Ladora

Additional Taxa (63)

  1. woodpecker sp. Picidae sp.
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  2. swallow sp. Hirundinidae sp.
    # Count: 4
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  3. teal sp. Anatidae sp. (teal sp.)
    # Count: 2
    Date:
    Observer: Dylan V
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  4. Greater/Lesser Scaup Aythya marila/affinis
    # Count: X
    Date:
    Observer: Dylan V
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  5. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 3
    Date:
    Observer: Katie Bates
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  6. new world warbler sp. Parulidae sp.
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  7. shorebird sp. Charadriiformes sp. (shorebird sp.)
    # Count: 2
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  8. Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
    # Count: 1
    Date:
    Observer: Joan Holmes
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  9. new world sparrow sp. Passerellidae sp.
    # Count: 4
    Date:
    Observer: Dylan V
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  10. gull sp. Larinae sp.
    # Count: 2
    Date:
    Observer: Emily S
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  11. Horned/Eared Grebe Podiceps auritus/nigricollis
    # Count: 2
    Date:
    Observer: Chris Kennelly
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  12. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  13. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: 1
    Date:
    Observer: Lesly B
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  14. duck sp. Anatidae (duck sp.)
    # Count: 12
    Date:
    Observer: Carly Crow
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  15. pigeon/dove sp. Columbidae sp.
    # Count: 3
    Date:
    Observer: Emily S
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  16. Common/Barrow's Goldeneye Bucephala clangula/islandica
    # Count: 1
    Date:
    Observer: Maggie N
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  17. Larus sp. Larus sp.
    # Count: 55
    Date:
    Observer: Ethan Allred
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  18. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Patti Galli
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  19. Western/Eastern Meadowlark Sturnella neglecta/magna
    # Count: 6
    Date:
    Observer: Gregg Hitchings
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  20. grebe sp. Podicipedidae sp.
    # Count: 1
    Date:
    Observer: Andrew Hillman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  21. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 1
    Date:
    Observer: Joe Verica
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  22. Spizella sp. Spizella sp.
    # Count: 1
    Date:
    Observer: Edward Raynor
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  23. Sharp-shinned/Cooper's Hawk Accipiter striatus/Astur cooperii
    # Count: 1
    Date:
    Observer: Crystal Wilson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  24. crow/raven sp. Corvus sp.
    # Count: 6
    Date:
    Observer: Mark Pryshlak
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  25. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 28
    Date:
    Observer: Norman Erthal
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  26. Aythya sp. Aythya sp.
    # Count: 1
    Date:
    Observer: Harold Eyster
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  27. thrush sp. Turdidae sp.
    # Count: 1
    Date:
    Observer: John Baur
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  28. Accipitrine hawk sp. (former Accipiter sp.) Aerospiza/Tachyspiza/Accipiter/Astur sp.
    # Count: 1
    Date:
    Observer: Doug Holder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  29. new world flycatcher sp. Tyrannidae sp.
    # Count: 1
    Date:
    Observer: Kathy Miller
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  30. heron sp. Ardeidae sp.
    # Count: 1
    Date:
    Observer: Julie Hendricksen
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  31. peep sp. Calidris sp. (peep sp.)
    # Count: 6
    Date:
    Observer: Archer Silverman
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  32. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 1
    Date:
    Observer: Ben Cole
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  33. hummingbird sp. Trochilidae sp.
    # Count: 1
    Date:
    Observer: Ben Cole
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  34. Tree/Violet-green Swallow Tachycineta bicolor/thalassina
    # Count: 1
    Date:
    Observer: Noah Sanford
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  35. Cassin's/Western Kingbird Tyrannus vociferans/verticalis
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  36. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    # Count: 7
    Date:
    Observer: Jesse Wentworth
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  37. Calidris sp. Calidris sp.
    # Count: 1
    Date:
    Observer: Jason B Bidgood
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  38. goose sp. Anatidae (goose sp.)
    # Count: 1
    Date:
    Observer: Kieran Doolittle
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  39. nuthatch sp. Sitta sp.
    # Count: 1
    Date:
    Observer: Laura Nelson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  40. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    # Count: 2
    Date:
    Observer: Julie Hendricksen
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  41. Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Eve Hallock
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  42. blackbird sp. Icteridae sp.
    # Count: 1
    Date:
    Observer: Gigi Zarzuela
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  43. Common/Red-breasted Merganser Mergus merganser/serrator
    # Count: 1
    Date:
    Observer: Jordan Gerue
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  44. passerine sp. Passeriformes sp.
    # Count: 1
    Date:
    Observer: Johnny Galt
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  45. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    # Count: 2
    Date:
    Observer: Will Black
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  46. grackle sp. Quiscalus sp.
    # Count: 1
    Date:
    Observer: Anonymous eBirder
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  47. pewee sp. (Contopus sp.) Contopus sp.
    # Count: 1
    Date:
    Observer: Peter Monson
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  48. Western/Semipalmated Sandpiper Calidris mauri/pusilla
    # Count: 6
    Date:
    Observer: Charlie Curlee
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  49. Sturnella meadowlark sp. Sturnella sp.
    # Count: 1
    Date:
    Observer: P Carl
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  50. Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violacea
    # Count: 1
    Date:
    Observer: P Carl
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  51. Buteo/eagle sp. Buteo/eagle sp.
    # Count: 1
    Date:
    Observer: Evan Tilton
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  52. Mallard/Mexican Duck Anas platyrhynchos/diazi
    # Count: 1
    Date:
    Observer: Frank Coons
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  53. raven sp. Corvus sp. (raven sp.)
    # Count: 1
    Date:
    Observer: Steve Nord
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  54. falcon sp. Falco sp.
    # Count: 1
    Date:
    Observer: Sheridan Samano
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  55. small falcon sp. Falco sp. (small falcon sp.)
    # Count: 1
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  56. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    # Count: 3
    Date:
    Observer: Bez Bezuidenhout
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  57. Empidonax sp. Empidonax sp.
    # Count: 2
    Date:
    Observer: Hugh Kingery
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  58. Western/Eastern Wood-Pewee Contopus sordidulus/virens
    # Count: 1
    Date:
    Observer: Michael Sciortino
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  59. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Max Miller
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  60. Lincoln's/Swamp Sparrow Melospiza lincolnii/georgiana
    # Count: 1
    Date:
    Observer: John C Breitsch
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  61. bluebird sp. Sialia sp.
    # Count: 4
    Date:
    Observer: thomas sell
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  62. Lazuli/Indigo Bunting Passerina amoena/cyanea
    # Count: 2
    Date:
    Observer: Spencer Hardy
    Location: Rocky Mountain Arsenal NWR--Lake Ladora
  63. Snow/Ross's Goose Anser caerulescens/rossii
    # Count: 1
    Date:
    Observer: Wendy Wibbens
    Location: Rocky Mountain Arsenal NWR--Lake Ladora