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Triadelphia Reservoir--Brighton Dam (Mont. Co.)

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Bird List

Updated ~5 seconds ago
195 All Years 122 This Year 2024 49 This Month Jun 2024
Last Observed First Observed High Count

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  1. Species Name
    Count
    Date
    Observer
    Location

Native and Naturalized (122)

  1. Cackling Goose Branta hutchinsii
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  2. Killdeer Charadrius vociferus
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  3. American Pipit Anthus rubescens
    # Count: 10
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  4. Snow Goose Anser caerulescens
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  5. American Wigeon Mareca americana
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  6. Canvasback Aythya valisineria
    # Count: 3
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  7. Lesser Scaup Aythya affinis
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  8. Peregrine Falcon Falco peregrinus
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  9. American Tree Sparrow Spizelloides arborea
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  10. Tundra Swan Cygnus columbianus
    # Count: 6
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  11. Gadwall Mareca strepera
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  12. Green-winged Teal Anas crecca
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  13. Redhead Aythya americana
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  14. Red-tailed Hawk Buteo jamaicensis
    # Count: 1
    Date:
    Observer: Glenn Dalby
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  15. American Black Duck Anas rubripes
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  16. Bufflehead Bucephala albeola
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  17. Hooded Merganser Lophodytes cucullatus
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  18. Ruddy Duck Oxyura jamaicensis
    # Count: 7
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  19. Herring Gull Larus argentatus
    # Count: 2
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  20. Yellow-bellied Sapsucker Sphyrapicus varius
    # Count: 1
    Date:
    Observer: Wen Shyong
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  21. Ring-necked Duck Aythya collaris
    # Count: 20
    Date:
    Observer: Sam Heraghty
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  22. Horned Grebe Podiceps auritus
    # Count: 2
    Date:
    Observer: Stacy Rabinovitz
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  23. Swamp Sparrow Melospiza georgiana
    # Count: 1
    Date:
    Observer: Stacy Rabinovitz
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  24. Common Merganser Mergus merganser
    # Count: 2
    Date:
    Observer: Benjamin Costello
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  25. Bonaparte's Gull Chroicocephalus philadelphia
    # Count: 4
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  26. Caspian Tern Hydroprogne caspia
    # Count: 10
    Date:
    Observer: Carla Morris
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  27. Common Loon Gavia immer
    # Count: 3
    Date:
    Observer: Carla Morris
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  28. Golden-crowned Kinglet Regulus satrapa
    # Count: 2
    Date:
    Observer: Carla Morris
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  29. Dark-eyed Junco Junco hyemalis
    # Count: 6
    Date:
    Observer: Carla Morris
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  30. Cooper's Hawk Accipiter cooperii
    # Count: 1
    Date:
    Observer: Mary Lou Clark
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  31. Pine Warbler Setophaga pinus
    # Count: 1
    Date:
    Observer: Nathan Oliver
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  32. Common Raven Corvus corax
    # Count: 1
    Date:
    Observer: Lynn Kieffer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  33. Wild Turkey Meleagris gallopavo
    # Count: 1
    Date:
    Observer: Maria Sola
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  34. Greater Yellowlegs Tringa melanoleuca
    # Count: 1
    Date:
    Observer: Maria Sola
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  35. White-throated Sparrow Zonotrichia albicollis
    # Count: 2
    Date:
    Observer: Maria Sola
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  36. Prairie Warbler Setophaga discolor
    # Count: 1
    Date:
    Observer: Maria Sola
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  37. Black-throated Green Warbler Setophaga virens
    # Count: 1
    Date:
    Observer: Hilary Yarmus
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  38. Hairy Woodpecker Dryobates villosus
    # Count: 1
    Date:
    Observer: Kelley M Gordon
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  39. Hermit Thrush Catharus guttatus
    # Count: 1
    Date:
    Observer: Kelley M Gordon
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  40. Cape May Warbler Setophaga tigrina
    # Count: 1
    Date:
    Observer: Karen Voldal
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  41. Pied-billed Grebe Podilymbus podiceps
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  42. Ring-billed Gull Larus delawarensis
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  43. Ruby-crowned Kinglet Corthylio calendula
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  44. Red-breasted Merganser Mergus serrator
    # Count: 2
    Date:
    Observer: K. Laning
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  45. Swainson's Thrush Catharus ustulatus
    # Count: 1
    Date:
    Observer: K. Laning
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  46. Magnolia Warbler Setophaga magnolia
    # Count: 1
    Date:
    Observer: K. Laning
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  47. Black-and-white Warbler Mniotilta varia
    # Count: 2
    Date:
    Observer: Hilary Yarmus
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  48. Louisiana Waterthrush Parkesia motacilla
    # Count: 1
    Date:
    Observer: Olivia Butler
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  49. Purple Martin Progne subis
    # Count: 8
    Date:
    Observer: Bruce Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  50. Canada Warbler Cardellina canadensis
    # Count: 1
    Date:
    Observer: Bruce Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  51. Great Egret Ardea alba
    # Count: 3
    Date:
    Observer: Toni Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  52. Northern Rough-winged Swallow Stelgidopteryx serripennis
    # Count: 10
    Date:
    Observer: Toni Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  53. Yellow-rumped Warbler Setophaga coronata
    # Count: 1
    Date:
    Observer: Toni Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  54. Rose-breasted Grosbeak Pheucticus ludovicianus
    # Count: 1
    Date:
    Observer: Toni Evans
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  55. Carolina Chickadee Poecile carolinensis
    # Count: 1
    Date:
    Observer: Joseph Costa
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  56. Chimney Swift Chaetura pelagica
    # Count: 4
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  57. Ruby-throated Hummingbird Archilochus colubris
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  58. Spotted Sandpiper Actitis macularius
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  59. Solitary Sandpiper Tringa solitaria
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  60. Acadian Flycatcher Empidonax virescens
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  61. Warbling Vireo Vireo gilvus
    # Count: 2
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  62. White-breasted Nuthatch Sitta carolinensis
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  63. House Finch Haemorhous mexicanus
    # Count: 2
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  64. Common Grackle Quiscalus quiscula
    # Count: 6
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  65. Northern Waterthrush Parkesia noveboracensis
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  66. Blackpoll Warbler Setophaga striata
    # Count: 3
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  67. Scarlet Tanager Piranga olivacea
    # Count: 1
    Date:
    Observer: Angela Atwood-Moore
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  68. Red-shouldered Hawk Buteo lineatus
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  69. Barn Swallow Hirundo rustica
    # Count: 3
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  70. Wood Duck Aix sponsa
    # Count: 1
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  71. Double-crested Cormorant Nannopterum auritum
    # Count: 3
    Date:
    Observer: Joe Hanfman
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  72. Downy Woodpecker Dryobates pubescens
    # Count: 1
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  73. American Redstart Setophaga ruticilla
    # Count: 1
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  74. Eastern Wood-Pewee Contopus virens
    # Count: 5
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  75. Yellow-throated Vireo Vireo flavifrons
    # Count: 2
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  76. American Crow Corvus brachyrhynchos
    # Count: 3
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  77. Eastern Bluebird Sialia sialis
    # Count: 2
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  78. American Goldfinch Spinus tristis
    # Count: 2
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  79. Song Sparrow Melospiza melodia
    # Count: 2
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  80. Indigo Bunting Passerina cyanea
    # Count: 1
    Date:
    Observer: Thomas Lopez
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  81. Bald Eagle Haliaeetus leucocephalus
    # Count: 1
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  82. Red-bellied Woodpecker Melanerpes carolinus
    # Count: 1
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  83. Pileated Woodpecker Dryocopus pileatus
    # Count: 1
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  84. Brown Thrasher Toxostoma rufum
    # Count: 1
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  85. Cedar Waxwing Bombycilla cedrorum
    # Count: 5
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  86. Baltimore Oriole Icterus galbula
    # Count: 1
    Date:
    Observer: Scott Garrison
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  87. Mallard Anas platyrhynchos
    # Count: 4
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  88. Great Blue Heron Ardea herodias
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  89. Turkey Vulture Cathartes aura
    # Count: 3
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  90. Osprey Pandion haliaetus
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  91. Belted Kingfisher Megaceryle alcyon
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  92. Northern Flicker Colaptes auratus
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  93. Great Crested Flycatcher Myiarchus crinitus
    # Count: 2
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  94. Eastern Kingbird Tyrannus tyrannus
    # Count: 2
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  95. Blue Jay Cyanocitta cristata
    # Count: 2
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  96. Tufted Titmouse Baeolophus bicolor
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  97. Blue-gray Gnatcatcher Polioptila caerulea
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  98. Carolina Wren Thryothorus ludovicianus
    # Count: 3
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  99. House Sparrow Passer domesticus
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  100. Eastern Towhee Pipilo erythrophthalmus
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  101. Orchard Oriole Icterus spurius
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  102. Red-winged Blackbird Agelaius phoeniceus
    # Count: 2
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  103. Brown-headed Cowbird Molothrus ater
    # Count: 5
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  104. Common Yellowthroat Geothlypis trichas
    # Count: 1
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  105. Northern Parula Setophaga americana
    # Count: 2
    Date:
    Observer: Martin Boer
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  106. Canada Goose Branta canadensis
    # Count: 12
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  107. Mourning Dove Zenaida macroura
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  108. Black Vulture Coragyps atratus
    # Count: 13
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  109. Eastern Phoebe Sayornis phoebe
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  110. Red-eyed Vireo Vireo olivaceus
    # Count: 3
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  111. Fish Crow Corvus ossifragus
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  112. Tree Swallow Tachycineta bicolor
    # Count: 9
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  113. Cliff Swallow Petrochelidon pyrrhonota
    # Count: 14
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  114. House Wren Troglodytes aedon
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  115. European Starling Sturnus vulgaris
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  116. Gray Catbird Dumetella carolinensis
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  117. Northern Mockingbird Mimus polyglottos
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  118. Wood Thrush Hylocichla mustelina
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  119. American Robin Turdus migratorius
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  120. Chipping Sparrow Spizella passerina
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  121. Ovenbird Seiurus aurocapilla
    # Count: 1
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  122. Northern Cardinal Cardinalis cardinalis
    # Count: 2
    Date:
    Observer: David Richardson
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)

Additional Taxa (4)

  1. American/Fish Crow Corvus brachyrhynchos/ossifragus
    # Count: X
    Date:
    Observer: Nathaniel Miller
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  2. gull sp. Larinae sp.
    # Count: 30
    Date:
    Observer: Valerie Swan
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  3. swallow sp. Hirundinidae sp.
    # Count: 20
    Date:
    Observer: Tim Carney
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)
  4. Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
    # Count: 1
    Date:
    Observer: Joseph Costa
    Location: Triadelphia Reservoir--Brighton Dam (Mont. Co.)