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Bird List

Updated ~15 seconds ago
179 All Years 9 This Year 2024 1 This Month May 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (179)

  1. Mountain Bluebird Sialia currucoides
    # Count: 2
    Date:
    Observer: Holly Cozzi-Burr
    Location: Dillon Reservoir
  2. Rock Pigeon Columba livia
    # Count: 3
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  3. Black-billed Magpie Pica hudsonia
    # Count: 1
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  4. American Crow Corvus brachyrhynchos
    # Count: 4
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  5. Black-capped Chickadee Poecile atricapillus
    # Count: 1
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  6. Mountain Chickadee Poecile gambeli
    # Count: 2
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  7. Pygmy Nuthatch Sitta pygmaea
    # Count: 1
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  8. American Robin Turdus migratorius
    # Count: 2
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  9. House Sparrow Passer domesticus
    # Count: 5
    Date:
    Observer: todd peterson
    Location: Dillon Reservoir
  10. Canada Goose Branta canadensis
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  11. Lesser Scaup Aythya affinis
    # Count: 2
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  12. Long-tailed Duck Clangula hyemalis
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  13. Common Goldeneye Bucephala clangula
    # Count: 9
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  14. Barrow's Goldeneye Bucephala islandica
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  15. Common Merganser Mergus merganser
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  16. Common Raven Corvus corax
    # Count: 6
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  17. Gadwall Mareca strepera
    # Count: 7
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  18. Mallard Anas platyrhynchos
    # Count: 2
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  19. Green-winged Teal Anas crecca
    # Count: 8
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  20. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  21. Western Grebe Aechmophorus occidentalis
    # Count: 2
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  22. Ring-billed Gull Larus delawarensis
    # Count: 5
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  23. Herring Gull Larus argentatus
    # Count: 1
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  24. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  25. Bald Eagle Haliaeetus leucocephalus
    # Count: 2
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  26. Steller's Jay Cyanocitta stelleri
    # Count: 1
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  27. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Alyssa Hemler
    Location: Dillon Reservoir
  28. Dark-eyed Junco Junco hyemalis
    # Count: 2
    Date:
    Observer: Alyssa Hemler
    Location: Dillon Reservoir
  29. California Gull Larus californicus
    # Count: 1
    Date:
    Observer: Christopher B 🦆
    Location: Dillon Reservoir
  30. Broad-tailed Hummingbird Selasphorus platycercus
    # Count: 1
    Date:
    Observer: John Marvin
    Location: Dillon Reservoir
  31. American Avocet Recurvirostra americana
    # Count: 2
    Date:
    Observer: Patti Shwartz
    Location: Dillon Reservoir
  32. Red-tailed Hawk Buteo jamaicensis
    # Count: 3
    Date:
    Observer: Andrew Creager
    Location: Dillon Reservoir
  33. Mourning Dove Zenaida macroura
    # Count: 2
    Date:
    Observer: Joanna Clark
    Location: Dillon Reservoir
  34. Western Flycatcher Empidonax difficilis
    # Count: 1
    Date:
    Observer: Joanna Clark
    Location: Dillon Reservoir
  35. Violet-green Swallow Tachycineta thalassina
    # Count: 53
    Date:
    Observer: Joanna Clark
    Location: Dillon Reservoir
  36. Red-winged Blackbird Agelaius phoeniceus
    # Count: 2
    Date:
    Observer: Joanna Clark
    Location: Dillon Reservoir
  37. Spotted Sandpiper Actitis macularius
    # Count: 3
    Date:
    Observer: Tyson Ferryman
    Location: Dillon Reservoir
  38. Tree Swallow Tachycineta bicolor
    # Count: 6
    Date:
    Observer: Tyson Ferryman
    Location: Dillon Reservoir
  39. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 1
    Date:
    Observer: Tyson Ferryman
    Location: Dillon Reservoir
  40. Song Sparrow Melospiza melodia
    # Count: 1
    Date:
    Observer: Tyson Ferryman
    Location: Dillon Reservoir
  41. Yellow Warbler Setophaga petechia
    # Count: 3
    Date:
    Observer: Tyson Ferryman
    Location: Dillon Reservoir
  42. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 2
    Date:
    Observer: Josh Engel
    Location: Dillon Reservoir
  43. American White Pelican Pelecanus erythrorhynchos
    # Count: 32
    Date:
    Observer: Sherri H
    Location: Dillon Reservoir
  44. Great Black-backed Gull Larus marinus
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  45. American Wigeon Mareca americana
    # Count: 10
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  46. Bufflehead Bucephala albeola
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  47. Eared Grebe Podiceps nigricollis
    # Count: 6
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  48. Greater Scaup Aythya marila
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  49. Iceland Gull Larus glaucoides
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  50. Pacific Loon Gavia pacifica
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  51. Redhead Aythya americana
    # Count: 1
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  52. Townsend's Solitaire Myadestes townsendi
    # Count: 3
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  53. Turkey Vulture Cathartes aura
    # Count: 1
    Date:
    Observer: Dorian Anderson
    Location: Dillon Reservoir
  54. Calliope Hummingbird Selasphorus calliope
    # Count: 1
    Date:
    Observer: Bodhi Barnett
    Location: Dillon Reservoir
  55. Warbling Vireo Vireo gilvus
    # Count: 1
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  56. European Starling Sturnus vulgaris
    # Count: 2
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  57. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  58. Savannah Sparrow Passerculus sandwichensis
    # Count: 4
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  59. Brown-headed Cowbird Molothrus ater
    # Count: 2
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  60. Yellow-rumped Warbler Setophaga coronata
    # Count: 1
    Date:
    Observer: Thomas Rohtsalu
    Location: Dillon Reservoir
  61. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: Mike Clark
    Location: Dillon Reservoir
  62. Canada Jay Perisoreus canadensis
    # Count: 2
    Date:
    Observer: Mike Clark
    Location: Dillon Reservoir
  63. Cassin's Finch Haemorhous cassinii
    # Count: 3
    Date:
    Observer: Mike Clark
    Location: Dillon Reservoir
  64. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Roma Quattro
    Location: Dillon Reservoir
  65. American Coot Fulica americana
    # Count: 2
    Date:
    Observer: Kayden Dangremond
    Location: Dillon Reservoir
  66. American Pipit Anthus rubescens
    # Count: 2
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  67. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  68. Common Grackle Quiscalus quiscula
    # Count: 1
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  69. Wilson's Warbler Cardellina pusilla
    # Count: 2
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  70. Golden Eagle Aquila chrysaetos
    # Count: 1
    Date:
    Observer: Chuck Hignite
    Location: Dillon Reservoir
  71. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 1
    Date:
    Observer: Mark Simons
    Location: Dillon Reservoir
  72. Dusky Flycatcher Empidonax oberholseri
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  73. Lincoln's Sparrow Melospiza lincolnii
    # Count: 3
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  74. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  75. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  76. House Wren Troglodytes aedon
    # Count: 1
    Date:
    Observer: Bea Weaver
    Location: Dillon Reservoir
  77. Blue-winged Teal Spatula discors
    # Count: 1
    Date:
    Observer: Alec Hopping
    Location: Dillon Reservoir
  78. Horned Lark Eremophila alpestris
    # Count: 1
    Date:
    Observer: Alec Hopping
    Location: Dillon Reservoir
  79. Brown Creeper Certhia americana
    # Count: 1
    Date:
    Observer: Julia Auckland
    Location: Dillon Reservoir
  80. Williamson's Sapsucker Sphyrapicus thyroideus
    # Count: 2
    Date:
    Observer: Julia Auckland
    Location: Dillon Reservoir
  81. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Julia Auckland
    Location: Dillon Reservoir
  82. Brewer's Sparrow Spizella breweri
    # Count: 3
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  83. Western Meadowlark Sturnella neglecta
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  84. Chipping Sparrow Spizella passerina
    # Count: 2
    Date:
    Observer: Kelly Liddell
    Location: Dillon Reservoir
  85. Vesper Sparrow Pooecetes gramineus
    # Count: 2
    Date:
    Observer: Kelly Liddell
    Location: Dillon Reservoir
  86. Townsend's Warbler Setophaga townsendi
    # Count: 1
    Date:
    Observer: Kelly Liddell
    Location: Dillon Reservoir
  87. Horned Grebe Podiceps auritus
    # Count: 1
    Date:
    Observer: Trey Rogers
    Location: Dillon Reservoir
  88. Semipalmated Plover Charadrius semipalmatus
    # Count: 3
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  89. Loggerhead Shrike Lanius ludovicianus
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  90. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  91. Clark's Grebe Aechmophorus clarkii
    # Count: 1
    Date:
    Observer: Christopher Curwen
    Location: Dillon Reservoir
  92. Double-crested Cormorant Nannopterum auritum
    # Count: 2
    Date:
    Observer: Christopher Curwen
    Location: Dillon Reservoir
  93. Baird's Sandpiper Calidris bairdii
    # Count: 3
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  94. Red-breasted Nuthatch Sitta canadensis
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  95. Gray Catbird Dumetella carolinensis
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  96. Lark Sparrow Chondestes grammacus
    # Count: 2
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  97. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: Susan Zevin
    Location: Dillon Reservoir
  98. Belted Kingfisher Megaceryle alcyon
    # Count: X
    Date:
    Observer: Sylvia Hilbig
    Location: Dillon Reservoir
  99. Red-naped Sapsucker Sphyrapicus nuchalis
    # Count: X
    Date:
    Observer: Sylvia Hilbig
    Location: Dillon Reservoir
  100. Barn Swallow Hirundo rustica
    # Count: 1
    Date:
    Observer: Kelly Brooks
    Location: Dillon Reservoir
  101. Downy Woodpecker Dryobates pubescens
    # Count: 2
    Date:
    Observer: Anthony Canganelli
    Location: Dillon Reservoir
  102. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 2
    Date:
    Observer: Roma Quattro
    Location: Dillon Reservoir
  103. House Finch Haemorhous mexicanus
    # Count: 4
    Date:
    Observer: Roma Quattro
    Location: Dillon Reservoir
  104. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  105. Wilson's Snipe Gallinago delicata
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  106. Hooded Merganser Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  107. Ruddy Duck Oxyura jamaicensis
    # Count: 2
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  108. Lesser Black-backed Gull Larus fuscus
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  109. Canvasback Aythya valisineria
    # Count: 5
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  110. Common Loon Gavia immer
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  111. Snowy Egret Egretta thula
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  112. Least Sandpiper Calidris minutilla
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  113. White-faced Ibis Plegadis chihi
    # Count: 8
    Date:
    Observer: Reed Gorner
    Location: Dillon Reservoir
  114. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: John Zygmunt
    Location: Dillon Reservoir
  115. Virginia's Warbler Leiothlypis virginiae
    # Count: 1
    Date:
    Observer: John Zygmunt
    Location: Dillon Reservoir
  116. Red Crossbill Loxia curvirostra
    # Count: 2
    Date:
    Observer: Fred Wamboldt
    Location: Dillon Reservoir
  117. Western Kingbird Tyrannus verticalis
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  118. Wilson's Phalarope Phalaropus tricolor
    # Count: 2
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  119. American Golden-Plover Pluvialis dominica
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  120. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  121. Burrowing Owl Athene cunicularia
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  122. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  123. Forster's Tern Sterna forsteri
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  124. Rock Wren Salpinctes obsoletus
    # Count: 1
    Date:
    Observer: Reed Gerdes
    Location: Dillon Reservoir
  125. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  126. Northern Shoveler Spatula clypeata
    # Count: 3
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  127. Yellow-billed Loon Gavia adamsii
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  128. Cinnamon Teal Spatula cyanoptera
    # Count: 1
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  129. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Phil Lyon
    Location: Dillon Reservoir
  130. Lark Bunting Calamospiza melanocorys
    # Count: 1
    Date:
    Observer: Charlie Nims
    Location: Dillon Reservoir
  131. Swainson's Hawk Buteo swainsoni
    # Count: 1
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  132. Scissor-tailed Flycatcher Tyrannus forficatus
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  133. Rough-legged Hawk Buteo lagopus
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  134. Sora Porzana carolina
    # Count: 1
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  135. Clark's Nutcracker Nucifraga columbiana
    # Count: 1
    Date:
    Observer: Chris Brobin
    Location: Dillon Reservoir
  136. Rufous Hummingbird Selasphorus rufus
    # Count: 3
    Date:
    Observer: Eric Matthews
    Location: Dillon Reservoir
  137. Sage Thrasher Oreoscoptes montanus
    # Count: 1
    Date:
    Observer: Eric Matthews
    Location: Dillon Reservoir
  138. Solitary Sandpiper Tringa solitaria
    # Count: 1
    Date:
    Observer: Eric Matthews
    Location: Dillon Reservoir
  139. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 1
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  140. Olive-sided Flycatcher Contopus cooperi
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  141. Willet Tringa semipalmata
    # Count: 8
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  142. American Dipper Cinclus mexicanus
    # Count: 1
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  143. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Dillon Reservoir
  144. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Dillon Reservoir
  145. Purple Sandpiper Calidris maritima
    # Count: 1
    Date:
    Observer: Rosanne Juergens
    Location: Dillon Reservoir
  146. Cackling Goose Branta hutchinsii
    # Count: 2
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  147. Cedar Waxwing Bombycilla cedrorum
    # Count: 3
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  148. Sandhill Crane Antigone canadensis
    # Count: 200
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  149. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  150. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Al Zerbe
    Location: Dillon Reservoir
  151. American Goldfinch Spinus tristis
    # Count: 1
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  152. Lesser Goldfinch Spinus psaltria
    # Count: 1
    Date:
    Observer: Jeffrey White
    Location: Dillon Reservoir
  153. Northern Pintail Anas acuta
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  154. Red-breasted Merganser Mergus serrator
    # Count: 1
    Date:
    Observer: William Kaempfer
    Location: Dillon Reservoir
  155. Golden-crowned Kinglet Regulus satrapa
    # Count: 1
    Date:
    Observer: Sean Walters
    Location: Dillon Reservoir
  156. Black-headed Grosbeak Pheucticus melanocephalus
    # Count: 1
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  157. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Dillon Reservoir
  158. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Christine Alexander
    Location: Dillon Reservoir
  159. Franklin's Gull Leucophaeus pipixcan
    # Count: 1
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  160. Plumbeous Vireo Vireo plumbeus
    # Count: 1
    Date:
    Observer: 1 Conundrum
    Location: Dillon Reservoir
  161. Common Nighthawk Chordeiles minor
    # Count: 1
    Date:
    Observer: Fred Wamboldt
    Location: Dillon Reservoir
  162. Pine Grosbeak Pinicola enucleator
    # Count: 1
    Date:
    Observer: Sean Walters
    Location: Dillon Reservoir
  163. Northern Shrike Lanius borealis
    # Count: 1
    Date:
    Observer: Bonnie Boex
    Location: Dillon Reservoir
  164. Wood Duck Aix sponsa
    # Count: 4
    Date:
    Observer: ken ecton
    Location: Dillon Reservoir
  165. Great Horned Owl Bubo virginianus
    # Count: X
    Date:
    Observer: James Beatty
    Location: Dillon Reservoir
  166. Bullock's Oriole Icterus bullockii
    # Count: 2
    Date:
    Observer: Patrick Addy
    Location: Dillon Reservoir
  167. Ring-necked Duck Aythya collaris
    # Count: X
    Date:
    Observer: Judi Sierra
    Location: Dillon Reservoir
  168. American Tree Sparrow Spizelloides arborea
    # Count: 1
    Date:
    Observer: Bonnie Boex
    Location: Dillon Reservoir
  169. Red-necked Phalarope Phalaropus lobatus
    # Count: 4
    Date:
    Observer: Ted Floyd
    Location: Dillon Reservoir
  170. Western Bluebird Sialia mexicana
    # Count: 2
    Date:
    Observer: Sandy Wyatt
    Location: Dillon Reservoir
  171. American Three-toed Woodpecker Picoides dorsalis
    # Count: 1
    Date:
    Observer: Nick Fensler
    Location: Dillon Reservoir
  172. Spotted Towhee Pipilo maculatus
    # Count: 1
    Date:
    Observer: Nick Fensler
    Location: Dillon Reservoir
  173. Black Scoter Melanitta americana
    # Count: 1
    Date:
    Observer: Tony Leukering
    Location: Dillon Reservoir
  174. Prairie Falcon Falco mexicanus
    # Count: X
    Date:
    Observer: James Beatty
    Location: Dillon Reservoir
  175. Willow Flycatcher Empidonax traillii
    # Count: X
    Date:
    Observer: James Beatty
    Location: Dillon Reservoir
  176. Fox Sparrow Passerella iliaca
    # Count: X
    Date:
    Observer: James Beatty
    Location: Dillon Reservoir
  177. Dusky Grouse Dendragapus obscurus
    # Count: 1
    Date:
    Observer: Jim Kettelkamp
    Location: Dillon Reservoir
  178. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Dillon Reservoir
  179. American Goshawk Accipiter atricapillus
    # Count: 1
    Date:
    Observer: Van Remsen
    Location: Dillon Reservoir

Hybrids (1)

  1. Common x Barrow's Goldeneye (hybrid) Bucephala clangula x islandica
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir

Additional Taxa (32)

  1. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Dillon Reservoir
  2. gull sp. Larinae sp.
    # Count: 2
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  3. duck sp. Anatidae (duck sp.)
    # Count: 30
    Date:
    Observer: Chris A. Blakeslee
    Location: Dillon Reservoir
  4. Common/Barrow's Goldeneye Bucephala clangula/islandica
    # Count: 20
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  5. shorebird sp. Charadriiformes sp.
    # Count: 1
    Date:
    Observer: Daniel Moore
    Location: Dillon Reservoir
  6. passerine sp. Passeriformes sp.
    # Count: 2
    Date:
    Observer: Daniel Moore
    Location: Dillon Reservoir
  7. Buteo sp. Buteo sp.
    # Count: 8
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  8. new world warbler sp. Parulidae sp.
    # Count: 5
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  9. Downy/Hairy Woodpecker Dryobates pubescens/villosus
    # Count: 1
    Date:
    Observer: Steve Riley
    Location: Dillon Reservoir
  10. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 20
    Date:
    Observer: Wolfe R
    Location: Dillon Reservoir
  11. Trumpeter/Tundra Swan Cygnus buccinator/columbianus
    # Count: 2
    Date:
    Observer: Wolfe R
    Location: Dillon Reservoir
  12. swan sp. Cygnus sp.
    # Count: 2
    Date:
    Observer: Anonymous eBirder
    Location: Dillon Reservoir
  13. Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
    # Count: 2
    Date:
    Observer: Alec Hopping
    Location: Dillon Reservoir
  14. hummingbird sp. Trochilidae sp.
    # Count: 1
    Date:
    Observer: Susan Zevin
    Location: Dillon Reservoir
  15. swallow sp. Hirundinidae sp.
    # Count: 1
    Date:
    Observer: Susan Zevin
    Location: Dillon Reservoir
  16. Aythya sp. Aythya sp.
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  17. Horned/Eared Grebe Podiceps auritus/nigricollis
    # Count: 35
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  18. Common/Red-breasted Merganser Mergus merganser/serrator
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  19. new world sparrow sp. Passerellidae sp.
    # Count: 3
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  20. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    # Count: 32
    Date:
    Observer: Laura Stanfill
    Location: Dillon Reservoir
  21. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 3
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  22. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: 1
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  23. pigeon/dove sp. Columbidae sp.
    # Count: 6
    Date:
    Observer: Misty Walters
    Location: Dillon Reservoir
  24. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 25
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  25. teal sp. Anatidae sp. (teal sp.)
    # Count: 25
    Date:
    Observer: Ryan Bushong
    Location: Dillon Reservoir
  26. blackbird sp. Icteridae sp.
    # Count: 1
    Date:
    Observer: Ana Jonas
    Location: Dillon Reservoir
  27. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  28. Larus sp. Larus sp.
    # Count: 1
    Date:
    Observer: Ted Floyd
    Location: Dillon Reservoir
  29. Setophaga sp. Setophaga sp.
    # Count: 2
    Date:
    Observer: Jeffrey White
    Location: Dillon Reservoir
  30. bluebird sp. Sialia sp.
    # Count: 1
    Date:
    Observer: Jack Bushong
    Location: Dillon Reservoir
  31. Spizella sp. Spizella sp.
    # Count: 1
    Date:
    Observer: ryanjack Bushong
    Location: Dillon Reservoir
  32. wren sp. Troglodytidae sp.
    # Count: X
    Date:
    Observer: Sylvia Maulding
    Location: Dillon Reservoir