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Bird List

Updated ~32 seconds ago
194 All Years 61 This Year 2024 0 This Month May 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (194)

  1. Canada Goose Branta canadensis
    # Count: 30
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  2. Redhead Aythya americana
    # Count: 2
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  3. Lesser Scaup Aythya affinis
    # Count: 10
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  4. Eared Grebe Podiceps nigricollis
    # Count: 20
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  5. Western Grebe Aechmophorus occidentalis
    # Count: 20
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  6. California Gull Larus californicus
    # Count: 20
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  7. Double-crested Cormorant Nannopterum auritum
    # Count: 30
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  8. American White Pelican Pelecanus erythrorhynchos
    # Count: 100
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  9. Black-crowned Night Heron Nycticorax nycticorax
    # Count: 3
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  10. Great Blue Heron Ardea herodias
    # Count: 2
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  11. Yellow-headed Blackbird Xanthocephalus xanthocephalus
    # Count: 5
    Date:
    Observer: Patricia Barry
    Location: Walden Reservoir
  12. Cinnamon Teal Spatula cyanoptera
    # Count: 9
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  13. Gadwall Mareca strepera
    # Count: 11
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  14. Canvasback Aythya valisineria
    # Count: 25
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  15. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  16. American Coot Fulica americana
    # Count: 80
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  17. Ring-billed Gull Larus delawarensis
    # Count: 11
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  18. Northern Harrier Circus hudsonius
    # Count: 1
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  19. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  20. Common Raven Corvus corax
    # Count: 2
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  21. Barn Swallow Hirundo rustica
    # Count: 3
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  22. European Starling Sturnus vulgaris
    # Count: 15
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  23. Red-winged Blackbird Agelaius phoeniceus
    # Count: 60
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  24. Brewer's Blackbird Euphagus cyanocephalus
    # Count: 4
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  25. Blue-winged Teal Spatula discors
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  26. Northern Shoveler Spatula clypeata
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  27. Mallard Anas platyrhynchos
    # Count: 5
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  28. Northern Pintail Anas acuta
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  29. Ring-necked Duck Aythya collaris
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  30. American Avocet Recurvirostra americana
    # Count: 4
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  31. Swainson's Hawk Buteo swainsoni
    # Count: 4
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  32. Black-billed Magpie Pica hudsonia
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  33. American Crow Corvus brachyrhynchos
    # Count: 3
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  34. Horned Lark Eremophila alpestris
    # Count: 3
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  35. Mountain Bluebird Sialia currucoides
    # Count: 2
    Date:
    Observer: M Gaylord
    Location: Walden Reservoir
  36. Snow Goose Anser caerulescens
    # Count: 4
    Date:
    Observer: Steve Borgwald
    Location: Walden Reservoir
  37. Snowy Egret Egretta thula
    # Count: 1
    Date:
    Observer: Steve Borgwald
    Location: Walden Reservoir
  38. American Kestrel Falco sparverius
    # Count: 1
    Date:
    Observer: Steve Borgwald
    Location: Walden Reservoir
  39. Western Meadowlark Sturnella neglecta
    # Count: 2
    Date:
    Observer: Steve Borgwald
    Location: Walden Reservoir
  40. Common Grackle Quiscalus quiscula
    # Count: 1
    Date:
    Observer: Steve Borgwald
    Location: Walden Reservoir
  41. American Wigeon Mareca americana
    # Count: 25
    Date:
    Observer: Archer Silverman
    Location: Walden Reservoir
  42. Common Merganser Mergus merganser
    # Count: 2
    Date:
    Observer: Archer Silverman
    Location: Walden Reservoir
  43. Ruddy Duck Oxyura jamaicensis
    # Count: 1
    Date:
    Observer: Archer Silverman
    Location: Walden Reservoir
  44. Long-billed Curlew Numenius americanus
    # Count: 2
    Date:
    Observer: Archer Silverman
    Location: Walden Reservoir
  45. Marbled Godwit Limosa fedoa
    # Count: 13
    Date:
    Observer: Archer Silverman
    Location: Walden Reservoir
  46. Green-winged Teal Anas crecca
    # Count: 30
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  47. Bufflehead Bucephala albeola
    # Count: 2
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  48. Common Goldeneye Bucephala clangula
    # Count: 2
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  49. Eurasian Collared-Dove Streptopelia decaocto
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  50. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  51. Wilson's Snipe Gallinago delicata
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  52. Franklin's Gull Leucophaeus pipixcan
    # Count: 7
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  53. Turkey Vulture Cathartes aura
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  54. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  55. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Paul Gordy
    Location: Walden Reservoir
  56. Herring Gull Larus argentatus
    # Count: 1
    Date:
    Observer: Ezekiel Dobson
    Location: Walden Reservoir
  57. Golden Eagle Aquila chrysaetos
    # Count: 2
    Date:
    Observer: Ezekiel Dobson
    Location: Walden Reservoir
  58. Tree Swallow Tachycineta bicolor
    # Count: 1
    Date:
    Observer: Ezekiel Dobson
    Location: Walden Reservoir
  59. American Robin Turdus migratorius
    # Count: 1
    Date:
    Observer: Sally Palmer
    Location: Walden Reservoir
  60. Sandhill Crane Antigone canadensis
    # Count: 4
    Date:
    Observer: Skye Haas
    Location: Walden Reservoir
  61. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Skye Haas
    Location: Walden Reservoir
  62. Hooded Merganser Lophodytes cucullatus
    # Count: 2
    Date:
    Observer: Joey Kellner
    Location: Walden Reservoir
  63. Greater Sage-Grouse Centrocercus urophasianus
    # Count: 2
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  64. Horned Grebe Podiceps auritus
    # Count: 11
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  65. Black-capped Chickadee Poecile atricapillus
    # Count: 4
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  66. House Sparrow Passer domesticus
    # Count: 14
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  67. American Pipit Anthus rubescens
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  68. White-crowned Sparrow Zonotrichia leucophrys
    # Count: 6
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  69. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: robert beauchamp
    Location: Walden Reservoir
  70. Vesper Sparrow Pooecetes gramineus
    # Count: X
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  71. Savannah Sparrow Passerculus sandwichensis
    # Count: X
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  72. Lincoln's Sparrow Melospiza lincolnii
    # Count: 1
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  73. Brown-headed Cowbird Molothrus ater
    # Count: 8
    Date:
    Observer: Carol Bell
    Location: Walden Reservoir
  74. Long-billed Dowitcher Limnodromus scolopaceus
    # Count: 2
    Date:
    Observer: Betty Glass
    Location: Walden Reservoir
  75. Spotted Sandpiper Actitis macularius
    # Count: 1
    Date:
    Observer: Betty Glass
    Location: Walden Reservoir
  76. Willet Tringa semipalmata
    # Count: 2
    Date:
    Observer: Betty Glass
    Location: Walden Reservoir
  77. Baird's Sandpiper Calidris bairdii
    # Count: 4
    Date:
    Observer: Betty Glass
    Location: Walden Reservoir
  78. Sora Porzana carolina
    # Count: 5
    Date:
    Observer: Julianne Duncan
    Location: Walden Reservoir
  79. White-faced Ibis Plegadis chihi
    # Count: 1
    Date:
    Observer: Julianne Duncan
    Location: Walden Reservoir
  80. Violet-green Swallow Tachycineta thalassina
    # Count: 5
    Date:
    Observer: Julianne Duncan
    Location: Walden Reservoir
  81. Yellow Warbler Setophaga petechia
    # Count: 1
    Date:
    Observer: Julianne Duncan
    Location: Walden Reservoir
  82. Mourning Dove Zenaida macroura
    # Count: 3
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  83. Wilson's Phalarope Phalaropus tricolor
    # Count: 2
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  84. Solitary Sandpiper Tringa solitaria
    # Count: 2
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  85. Lesser Yellowlegs Tringa flavipes
    # Count: 2
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  86. Least Sandpiper Calidris minutilla
    # Count: 12
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  87. Forster's Tern Sterna forsteri
    # Count: 3
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  88. Bank Swallow Riparia riparia
    # Count: 9
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  89. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 4
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  90. Marsh Wren Cistothorus palustris
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  91. Sage Thrasher Oreoscoptes montanus
    # Count: 2
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  92. Brewer's Sparrow Spizella breweri
    # Count: 4
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  93. Lark Sparrow Chondestes grammacus
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  94. Lark Bunting Calamospiza melanocorys
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  95. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Chip Clouse
    Location: Walden Reservoir
  96. Western Kingbird Tyrannus verticalis
    # Count: 1
    Date:
    Observer: Chip Clouse
    Location: Walden Reservoir
  97. Chipping Sparrow Spizella passerina
    # Count: 1
    Date:
    Observer: Chip Clouse
    Location: Walden Reservoir
  98. Common Nighthawk Chordeiles minor
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  99. Virginia Rail Rallus limicola
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  100. Western Wood-Pewee Contopus sordidulus
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  101. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  102. House Wren Troglodytes aedon
    # Count: 2
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  103. American Goldfinch Spinus tristis
    # Count: 2
    Date:
    Observer: Robert Tonge
    Location: Walden Reservoir
  104. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Rebecca Weiss
    Location: Walden Reservoir
  105. Clark's Grebe Aechmophorus clarkii
    # Count: 1
    Date:
    Observer: Debra Sparn
    Location: Walden Reservoir
  106. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  107. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Diane Roberts
    Location: Walden Reservoir
  108. Black Tern Chlidonias niger
    # Count: 1
    Date:
    Observer: Kathryn Kay
    Location: Walden Reservoir
  109. Common Loon Gavia immer
    # Count: 1
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  110. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 6
    Date:
    Observer: Greg Scott
    Location: Walden Reservoir
  111. Rock Pigeon Columba livia
    # Count: 12
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  112. Broad-tailed Hummingbird Selasphorus platycercus
    # Count: 1
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  113. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 3
    Date:
    Observer: Finn Harty
    Location: Walden Reservoir
  114. Red-breasted Merganser Mergus serrator
    # Count: 3
    Date:
    Observer: Zachary Emery
    Location: Walden Reservoir
  115. Dark-eyed Junco Junco hyemalis
    # Count: X
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  116. Prairie Falcon Falco mexicanus
    # Count: 1
    Date:
    Observer: Ryan Dibala
    Location: Walden Reservoir
  117. Surf Scoter Melanitta perspicillata
    # Count: 2
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  118. Rusty Blackbird Euphagus carolinus
    # Count: 1
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  119. Yellow-rumped Warbler Setophaga coronata
    # Count: 11
    Date:
    Observer: janet fedrizzi
    Location: Walden Reservoir
  120. Red-necked Phalarope Phalaropus lobatus
    # Count: 5
    Date:
    Observer: Jonathan Lautenbach
    Location: Walden Reservoir
  121. Pectoral Sandpiper Calidris melanotos
    # Count: 5
    Date:
    Observer: Jonathan Lautenbach
    Location: Walden Reservoir
  122. Wilson's Warbler Cardellina pusilla
    # Count: 2
    Date:
    Observer: Jonathan Lautenbach
    Location: Walden Reservoir
  123. Western Sandpiper Calidris mauri
    # Count: 4
    Date:
    Observer: Mackenzie Goldthwait
    Location: Walden Reservoir
  124. Red-necked Grebe Podiceps grisegena
    # Count: 1
    Date:
    Observer: Adrian Lakin
    Location: Walden Reservoir
  125. Caspian Tern Hydroprogne caspia
    # Count: 2
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  126. Black-necked Stilt Himantopus mexicanus
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Walden Reservoir
  127. Cackling Goose Branta hutchinsii
    # Count: 2
    Date:
    Observer: Brendan Fogarty
    Location: Walden Reservoir
  128. Rough-legged Hawk Buteo lagopus
    # Count: 1
    Date:
    Observer: Phil Chaon
    Location: Walden Reservoir
  129. House Finch Haemorhous mexicanus
    # Count: 2
    Date:
    Observer: Mackenzie Goldthwait
    Location: Walden Reservoir
  130. Greater Scaup Aythya marila
    # Count: 3
    Date:
    Observer: Mackenzie Goldthwait
    Location: Walden Reservoir
  131. Say's Phoebe Sayornis saya
    # Count: 1
    Date:
    Observer: Doug Kibbe
    Location: Walden Reservoir
  132. Semipalmated Sandpiper Calidris pusilla
    # Count: 2
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  133. Scissor-tailed Flycatcher Tyrannus forficatus
    # Count: 1
    Date:
    Observer: Jake Shorty
    Location: Walden Reservoir
  134. Great Egret Ardea alba
    # Count: 1
    Date:
    Observer: Josh Bruening
    Location: Walden Reservoir
  135. Pine Siskin Spinus pinus
    # Count: 1
    Date:
    Observer: Michael Lester
    Location: Walden Reservoir
  136. Green-tailed Towhee Pipilo chlorurus
    # Count: 1
    Date:
    Observer: Luke Pheneger
    Location: Walden Reservoir
  137. Rock Wren Salpinctes obsoletus
    # Count: 1
    Date:
    Observer: Eric DeFonso 🦑
    Location: Walden Reservoir
  138. Semipalmated Plover Charadrius semipalmatus
    # Count: X
    Date:
    Observer: Jack OConnell
    Location: Walden Reservoir
  139. Mexican Duck Anas diazi
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  140. Western Cattle Egret Bubulcus ibis
    # Count: 3
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  141. Wood Duck Aix sponsa
    # Count: 2
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  142. Laughing Gull Leucophaeus atricilla
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  143. Eastern Kingbird Tyrannus tyrannus
    # Count: 1
    Date:
    Observer: Erik Ostrum
    Location: Walden Reservoir
  144. Black-bellied Plover Pluvialis squatarola
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  145. Sanderling Calidris alba
    # Count: 2
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  146. Arctic Tern Sterna paradisaea
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  147. Common Tern Sterna hirundo
    # Count: 5
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  148. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Joshua Smith
    Location: Walden Reservoir
  149. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Walden Reservoir
  150. Orange-crowned Warbler Leiothlypis celata
    # Count: 1
    Date:
    Observer: David Dowell
    Location: Walden Reservoir
  151. Western Tanager Piranga ludoviciana
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  152. Loggerhead Shrike Lanius ludovicianus
    # Count: 1
    Date:
    Observer: Tom Johnson
    Location: Walden Reservoir
  153. Barrow's Goldeneye Bucephala islandica
    # Count: 2
    Date:
    Observer: Doug Kibbe
    Location: Walden Reservoir
  154. American Tree Sparrow Spizelloides arborea
    # Count: 3
    Date:
    Observer: Cole Wild
    Location: Walden Reservoir
  155. Merlin Falco columbarius
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Walden Reservoir
  156. Sharp-shinned Hawk Accipiter striatus
    # Count: 1
    Date:
    Observer: Scott Surner
    Location: Walden Reservoir
  157. MacGillivray's Warbler Geothlypis tolmiei
    # Count: 1
    Date:
    Observer: Cole Wild
    Location: Walden Reservoir
  158. Stilt Sandpiper Calidris himantopus
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  159. Glossy Ibis Plegadis falcinellus
    # Count: 1
    Date:
    Observer: Caleb Strand
    Location: Walden Reservoir
  160. Ross's Goose Anser rossii
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  161. Greater White-fronted Goose Anser albifrons
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  162. Spotted Towhee Pipilo maculatus
    # Count: 2
    Date:
    Observer: Joe Gardner
    Location: Walden Reservoir
  163. Sagebrush Sparrow Artemisiospiza nevadensis
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Walden Reservoir
  164. Clay-colored Sparrow Spizella pallida
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  165. Green Heron Butorides virescens
    # Count: 1
    Date:
    Observer: Karen Moulder cc
    Location: Walden Reservoir
  166. Sabine's Gull Xema sabini
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  167. Tricolored Heron Egretta tricolor
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  168. Red-naped Sapsucker Sphyrapicus nuchalis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  169. Fox Sparrow Passerella iliaca
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  170. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: David Griffin
    Location: Walden Reservoir
  171. Ferruginous Hawk Buteo regalis
    # Count: 1
    Date:
    Observer: Warren Bielenberg
    Location: Walden Reservoir
  172. Calliope Hummingbird Selasphorus calliope
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  173. American Bittern Botaurus lentiginosus
    # Count: X
    Date:
    Observer: Roger Linfield
    Location: Walden Reservoir
  174. Cassin's Finch Haemorhous cassinii
    # Count: X
    Date:
    Observer: Roger Linfield
    Location: Walden Reservoir
  175. Mountain Chickadee Poecile gambeli
    # Count: 2
    Date:
    Observer: Charles Hundertmark
    Location: Walden Reservoir
  176. White-throated Swift Aeronautes saxatalis
    # Count: 1
    Date:
    Observer: Brookie/Jean Potter
    Location: Walden Reservoir
  177. Steller's Jay Cyanocitta stelleri
    # Count: 1
    Date:
    Observer: Brookie/Jean Potter
    Location: Walden Reservoir
  178. Gray Catbird Dumetella carolinensis
    # Count: 1
    Date:
    Observer: Brookie/Jean Potter
    Location: Walden Reservoir
  179. Bullock's Oriole Icterus bullockii
    # Count: 1
    Date:
    Observer: Brookie/Jean Potter
    Location: Walden Reservoir
  180. Gray-crowned Rosy-Finch Leucosticte tephrocotis
    # Count: X
    Date:
    Observer: Robert Martinez
    Location: Walden Reservoir
  181. Rufous Hummingbird Selasphorus rufus
    # Count: X
    Date:
    Observer: Robert Martinez
    Location: Walden Reservoir
  182. Dusky Flycatcher Empidonax oberholseri
    # Count: X
    Date:
    Observer: Robert Martinez
    Location: Walden Reservoir
  183. Townsend's Solitaire Myadestes townsendi
    # Count: X
    Date:
    Observer: Robert Martinez
    Location: Walden Reservoir
  184. Great Horned Owl Bubo virginianus
    # Count: 2
    Date:
    Observer: Steve Bennett
    Location: Walden Reservoir
  185. Warbling Vireo Vireo gilvus
    # Count: 2
    Date:
    Observer: Sean Walters
    Location: Walden Reservoir
  186. Chestnut-collared Longspur Calcarius ornatus
    # Count: 1
    Date:
    Observer: Richard Knapton
    Location: Walden Reservoir
  187. Trumpeter Swan Cygnus buccinator
    # Count: 2
    Date:
    Observer: Daniel Maynard
    Location: Walden Reservoir
  188. Western Bluebird Sialia mexicana
    # Count: 2
    Date:
    Observer: Christine Snitkin
    Location: Walden Reservoir
  189. Dusky Grouse Dendragapus obscurus
    # Count: X
    Date:
    Observer: Russ Costello
    Location: Walden Reservoir
  190. Northern Shrike Lanius borealis
    # Count: 1
    Date:
    Observer: Sue Riffe
    Location: Walden Reservoir
  191. Willow Flycatcher Empidonax traillii
    # Count: X
    Date:
    Observer: James Beatty
    Location: Walden Reservoir
  192. Plumbeous Vireo Vireo plumbeus
    # Count: X
    Date:
    Observer: James Beatty
    Location: Walden Reservoir
  193. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: X
    Date:
    Observer: James Beatty
    Location: Walden Reservoir
  194. Short-billed Dowitcher Limnodromus griseus
    # Count: 1
    Date:
    Observer: Carol Sullivan
    Location: Walden Reservoir

Hybrids (5)

  1. Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diazi
    # Count: 1
    Date:
    Observer: Denis Tétreault
    Location: Walden Reservoir
  2. Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkii
    # Count: 1
    Date:
    Observer: Oliver Komar
    Location: Walden Reservoir
  3. Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihi
    # Count: 1
    Date:
    Observer: Caleb Strand
    Location: Walden Reservoir
  4. Ring-necked Duck x Lesser Scaup (hybrid) Aythya collaris x affinis
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  5. Bufflehead x Common Goldeneye (hybrid) Bucephala albeola x clangula
    # Count: 1
    Date:
    Observer: Michael O'Brien
    Location: Walden Reservoir

Additional Taxa (36)

  1. gull sp. Larinae sp.
    # Count: 100
    Date:
    Observer: Paul Gordy
    Location: Walden Reservoir
  2. diurnal raptor sp. Accipitriformes/Falconiformes sp.
    # Count: 1
    Date:
    Observer: Sally Palmer
    Location: Walden Reservoir
  3. teal sp. Anatidae sp. (teal sp.)
    # Count: 14
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  4. dabbling duck sp. Anatidae sp. (dabbling duck sp.)
    # Count: 60
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  5. shorebird sp. Charadriiformes sp.
    # Count: 1
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  6. duck sp. Anatidae (duck sp.)
    # Count: 7
    Date:
    Observer: Barry Anthony
    Location: Walden Reservoir
  7. phalarope sp. Phalaropus sp.
    # Count: X
    Date:
    Observer: Forrest Luke
    Location: Walden Reservoir
  8. grebe sp. Podicipedidae sp.
    # Count: 200
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  9. swallow sp. Hirundinidae sp.
    # Count: 130
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  10. new world sparrow sp. Passerellidae sp.
    # Count: 20
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  11. passerine sp. Passeriformes sp.
    # Count: 15
    Date:
    Observer: Brian Genge
    Location: Walden Reservoir
  12. Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
    # Count: 4
    Date:
    Observer: Chip Clouse
    Location: Walden Reservoir
  13. Western/Clark's Grebe Aechmophorus occidentalis/clarkii
    # Count: 1
    Date:
    Observer: Kaj Overturf
    Location: Walden Reservoir
  14. Forster's/Common Tern Sterna forsteri/hirundo
    # Count: 1
    Date:
    Observer: Kathryn Kay
    Location: Walden Reservoir
  15. cormorant sp. Phalacrocoracidae sp.
    # Count: 25
    Date:
    Observer: Colby Neuman
    Location: Walden Reservoir
  16. Greater/Lesser Scaup Aythya marila/affinis
    # Count: 2
    Date:
    Observer: Tim Smart
    Location: Walden Reservoir
  17. Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
    # Count: 3
    Date:
    Observer: Shannon Fitch
    Location: Walden Reservoir
  18. large shorebird sp. Scolopacidae sp. (large shorebird sp.)
    # Count: 13
    Date:
    Observer: Diane Roberts
    Location: Walden Reservoir
  19. Mallard/Mexican Duck Anas platyrhynchos/diazi
    # Count: 1
    Date:
    Observer: Mark Robbins
    Location: Walden Reservoir
  20. Larus sp. Larus sp.
    # Count: 3
    Date:
    Observer: Brendan Fogarty
    Location: Walden Reservoir
  21. Spizella sp. Spizella sp.
    # Count: 1
    Date:
    Observer: Charles Hundertmark
    Location: Walden Reservoir
  22. loon sp. Gavia sp.
    # Count: 1
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  23. Aythya sp. Aythya sp.
    # Count: 100
    Date:
    Observer: Josh Bruening
    Location: Walden Reservoir
  24. Arctic/Pacific Loon Gavia arctica/pacifica
    # Count: 1
    Date:
    Observer: Peter Burke
    Location: Walden Reservoir
  25. blackbird sp. Icteridae sp.
    # Count: 50
    Date:
    Observer: Cedar Stanistreet
    Location: Walden Reservoir
  26. hawk sp. Accipitridae sp. (hawk sp.)
    # Count: 1
    Date:
    Observer: Nick Komar
    Location: Walden Reservoir
  27. Glossy/White-faced Ibis Plegadis falcinellus/chihi
    # Count: 9
    Date:
    Observer: Kathy Mihm Dunning
    Location: Walden Reservoir
  28. Common/Barrow's Goldeneye Bucephala clangula/islandica
    # Count: 1
    Date:
    Observer: Doug Kibbe
    Location: Walden Reservoir
  29. Cackling/Canada Goose Branta hutchinsii/canadensis
    # Count: 3
    Date:
    Observer: Steven Mlodinow
    Location: Walden Reservoir
  30. Snow/Ross's Goose Anser caerulescens/rossii
    # Count: 4
    Date:
    Observer: Caleb Strand
    Location: Walden Reservoir
  31. Buteo sp. Buteo sp.
    # Count: 1
    Date:
    Observer: Edward Brinkley
    Location: Walden Reservoir
  32. Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
    # Count: 9
    Date:
    Observer: Libby Megna
    Location: Walden Reservoir
  33. tern sp. Sterninae sp.
    # Count: 20
    Date:
    Observer: Libby Megna
    Location: Walden Reservoir
  34. bluebird sp. Sialia sp.
    # Count: 2
    Date:
    Observer: Charles Hundertmark
    Location: Walden Reservoir
  35. large falcon sp. Falco sp. (large falcon sp.)
    # Count: 1
    Date:
    Observer: Charles Hundertmark
    Location: Walden Reservoir
  36. Empidonax sp. Empidonax sp.
    # Count: 1
    Date:
    Observer: Hugh Kingery
    Location: Walden Reservoir