GRASS MT. COUNT SUMMARY

ARCHIVAL GRASS MOUNTAIN CBC (1972-1998 n = 25 Counts)

Compiled by Cal Yorke from field notes and NAS records

NAS Code: CAGM
NAS records: http://birds.audubon.org/historical-results
Total = 184 (6 introduced spp.) Highest Count = 131 (1993); Lowest Count = 47 (1977); Average = 94 (n=25).

CAGM CBC Participants included: Jonathan Alderfer, Mary Carmona, Tom Cholmondeley, Nick Freeman, Tom Frillman, Kimball Garrett, April Heath, Fred Heath, Tom Martin, Marty Martin, Virginia Martin, Nina Merrill, Larry Quinn, Pam Stones, Cal Yorke.

KEY

HC – Year = Highest count and CBC year.
P = Probability of encounter (number of counts found/23).
S = Section # (1 – 6) confirmed location of rarities and/or an ecologically restricted species. ? = questionable record; details lacking

THE NATIONAL AUDUBON SOCIETY GRASS MOUNTAIN (CAGM) COUNT CIRCLE   (Established by Tom Martin in 1972)      

CAGM BIRD LIST (1972-1998)

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • Tundra Swan 1 (1979) 0.04 6
  • Snow Goose 1 (1991) 0.04 6
  • Canada Goose 307(1977) 0.78
  • Wood Duck 2 (1984) 0.17
  • Gadwall 10 (1997) 0.56
  • American Wigeon 65 (1981) 0.6
  • Mallard 284 (1979) 1.0
  • Blue-winged Teal 1 (1984) 0.04 6
  • Cinnamon Teal 22 (1980) 0.47
  • Northern Shoveler 800 (1980) 0.91
  • Northern Pintail 902 (1983) 0.82
  • Green-winged Teal 246 (1981) 0.6
  • Canvasback 475 (1980) 0.91
  • Redhead 18 (1993) 0.39
  • Ring-necked Duck 272 (1980) 0.82
  • Lesser Scaup 18 (1987) 0.43
  • Greater Scaup 2 (1990) 0.04 1
  • Bufflehead 123 (1997) 0.91
  • Common Goldeneye 4 (1992) 0.35
  • Common Merganser 270 (1988) 0.78
  • Red-breasted Merganser 1 (1990) 0.04 ?
  • Ruddy Duck 1560(1983) 0.91
  • Chukar 1 (1984) 0.04 1
  • Mountain Quail 41 (1989) 0.52 5
  • California Quail 513 (1994) 1
  • Montezuma Quail 5 (1976) 0.04 1
  • Common Loon 2 (1997) 0.52
  • Pied-billed Grebe 34 (1993) 0.95
  • Horned Grebe 1 (1987) 0.04 3
  • Eared Grebe 235 (1982) 0.91
  • Western Grebe 48 (1986) 0.6
  • Clark’s Grebe 9 (1987) 0.1

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • Double-crested Cormorant 25 (1997) 0.47
  • American Bittern 1 (1994) 0.13 6
  • Great Blue Heron 10 (1988) 1
  • Great Egret 3 (1998) 0.13
  • Snowy Egret 1 (1984) 0.04 6
  • Cattle Egret 21 (1984) 0.04 6
  • Green Heron 1 (1993) 0.04 6
  • Black-crowned Night Heron 20 (1984) 0.56
  • Turkey Vulture 1 (1991) 0.08 ?
  • Osprey 1 0.13 6
  • Bald Eagle 1 (1980) 0.08 6
  • White-tailed Kite 5 (1981) 0.13 1
  • Northern Harrier 10 (1984) 0.82
  • Sharp-shinned Hawk 17 (1987) 0.78
  • Cooper’s Hawk 6 (1994) 0.69
  • Red-shouldered Hawk 26 (1994) 0.87
  • Red-tailed Hawk 91 (1994) 1
  • Ferruginous Hawk 15 (1989) 0.82
  • Rough-legged Hawk 8 (1989) 0.52 1
  • Golden Eagle 4 (1973) 0.65 1
  • American Kestrel 87 (1994) 1
  • Merlin 3 (1987) 0.3
  • Prairie Falcon 4 (1980) 0.69 1

SPECIES High count (HC – Year) Encounter Probability (P) Section (1-6)

  • Virginia Rail 1 (1984) 0.13 6
  • Sora 1 (1984) 0.13 6
  • American Coot 550 (1980) 1
  • Killdeer 28 (1984) 0.95
  • Mountain Plover 75 (1987) 0.17
  • Spotted Sandpiper 3 (1982) 0.6
  • Greater Yellowlegs 1 1 (1991) 0.04 6
  • Long-billed Curlew 18 (1980) 0.17 1
  • Long-billed Dowitcher 2 (1979) 0.08 6
  • Least Sandpiper 35 (1992) 0.52
  • Wilson’s Snipe 12 (1979) 0.17 6
  • Ring-billed Gull 20 (1984) 0.13
  • California Gull 33 (1995) 0.43
  • Herring Gull 1 1 (1987) 0.04 6?
  • Rock Pigeon 254 (1992) 1
  • Band-tailed Pigeon 97 (1987) 0.39 5
  • Spotted Dove 2 (1988) 0.08 2
  • Mourning Dove 149 (1994) 0.91
  • Greater Roadrunner 2 (1998) 0.21 1
  • Barn Owl 5 (1984) 0.52
  • Western Screech Owl 1 (1995) 0.3 2
  • Great Horned Owl 5 (1979) 0.6
  • Burrowing Owl 3 (1979) 0.43 1
  • Short-eared Owl 2 (1989) 0.04 6?
  • Northern Pygmy Owl 1 (1993) 0.04 5
  • Spotted Owl 1 (1993) 0.04 5
  • Long-eared Owl 5 (1993) 0.08 1

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • White-throated Swift 35 (1994) 0.13 4?
  • Anna’s Hummingbird 99 (1993) 0.82
  • Belted Kingfisher 5 (1984) 0.56
  • Lewis’s Woodpecker 4 (1997) 0.17 5
  • Acorn Woodpecker 196 (1988) 1
  • Red-breasted Sapsucker 11 (1996) 0.52 5
  • Red-naped Sapsucker 4 (1979) 0.26
  • Yellow-bellied Sapsucker ? 5?
  • Williamson’s Sapsucker 1 (1989) 0.04 5
  • Nuttall’s Woodpecker 31 (1987) 0.87
  • Ladder-backed Woodpecker 2 (1991) 0.21 1
  • Downy Woodpecker 8 (1993) 0.82
  • Hairy Woodpecker 4 (1997) 0.43
  • White-headed Woodpecker 1 (1988) 0.08 5
  • Northern (Red-shafted) Flicker 50 (1994) 1
  • Black Phoebe 47 (1994) 0.91
  • Say’s Phoebe 18 (1984) 0.78
  • Cassin’s Kingbird 1 (1996) 0.04
  • Loggerhead Shrike 51 (1994) 1
  • Hutton’s Vireo 3 (1997) 0.26
  • Steller’s Jay 20 (1989) 0.47 5
  • California Scrub Jay 559 (1988) 1 1
  • American Crow 212 (1993) 0.87
  • Common Raven 269 (1994) 0.95
  • Horned Lark 3333 (1995) 0.95 1
  • Violet-green Swallow 1 ( 1983) 0.04
  • Mountain Chickadee 49 (1988) 0.74
  • Oak Titmouse 118 (1987) 1.0 1
  • Bushtit 210 (1997) 0.95
  • Verdin 1 (1990) 0.04
  • Red-breasted Nuthatch 8 (1987) 0.21
  • White-breasted Nuthatch 60 (1986) 0.91
  • Pygmy Nuthatch 3 (1991) 0.13 5
  • Brown Creeper 3 (1993) 0.35
  • Rock Wren 10 (1993) 0.69
  • Canyon Wren 5 (1995) 0.3
  • Bewick’s Wren 117 (1987) 0.95
  • Northern House Wren 27 (1994) 0.65
  • Pacific (Winter) Wren 2 (1994) 0.26
  • Marsh Wren 17 (1994) 0.56
  • American Dipper 1 (1991) 0.17
  • Golden-crowned Kinglet 12 (1993) 0.21 5
  • Ruby-crowned Kinglet 890 (1981) 1
  • Blue-gray Gnatcatcher 5 (1992) 0.3

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • Western Bluebird 300 (1986) 1 6
  • Mountain Bluebird 182 (1994) 0.78 1
  • Townsend’s Solitaire 6 (1988) 0.21 5
  • Hermit Thrush 72 (1988) 0.95
  • American Robin 798 (1987) 0.95
  • Varied Thrush 34 (1988) 0.52 3
  • Wrentit 122 (1987) 0.74
  • Northern Mockingbird 42 (1994) 0.95
  • Sage Thrasher 1 (1990) 0.04 1
  • California Thrasher 116 (1991) 0.87
  • European Starling 1300 (1979) 1
  • American Pipit 46 (1989) 0.3
  • Cedar Waxwing 177 (1988) 0.56
  • Phainopepla 23 (1991) 0.82
  • Orange-crowned Warbler 3 (1996) 0.43
  • Yellow Warbler 1 (1994) 0.04
  • Ovenbird 1 (1978) 0.04 3
  • Yellow-rumped (A) 151 (1992) 0.95
  • Yellow-rumped (M) Warbler 4 (1984) 0.26
  • Black-throated Gray Warbler 1 (1987) 0.04
  • Hermit Warbler 1 (1989) 0.04 5
  • MacGillivray’s Warbler 1 (1983) 0.04 5
  • Townsend’s Warbler 11 (1987) 0.35
  • Common Yellowthroat 23 ( 1997) 0.56

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • Spotted Towhee 220 (1987) 0.95
  • California Towhee 158 (1993) 0.95
  • Rufous-crowned Sparrow 22 (1984) 0.6
  • Chipping Sparrow 75 (1996) 0.26
  • Vesper Sparrow 35 (1993) 0.78
  • Lark Sparrow 681 (1992) 0.87)
  • Black-throated Sparrow 2 (1995) 0.08 1
  • Sage Sparrow 7 (1990) 0.3
  • Savannah Sparrow 200 (1984) 0.87
  • Grasshopper Sparrow 1 (1991) 0.04 4
  • Fox Sparrow (Western) 74 (1988) 0.78
  • Fox Sparrow (Eastern) 1 (1984) 0.04 3
  • Song Sparrow 134 (1997) 0.95
  • Lincoln’s Sparrow 95 (1984) 0.6
  • Swamp Sparrow 1 (1984) 0.04 6
  • White-throated Sparrow 1 (1989) 0.08 3
  • White-crowned Sparrow 918 (1995) 0.95
  • Golden-crowned Sparrow 242 (1987) 0.87
  • Dark-eyed Junco (thurberi) 596 (1998) 0.95
  • Dark-eyed Junco (hyemalis) 2 (1987) 0.08
  • Dark-eyed Junco (mearnsi) 1 (1997) 0.04

SPECIES High Count (HC – Year) Encounter Probability (P) Section (1-6)

  • Red-winged Blackbird 1111(1980) 0.74
  • Tricolored Blackbird 601 (1980) 0.74
  • Yellow-headed Blackbird 1 (1997) 0.08 6
  • Western Meadowlark 333 (1984) 1
  • Brewer’s Blackbird 2090 (1986) 1
  • Great-tailed Grackle  7  (1997) 0.08 6
  • Brown-headed Cowbird 200 (1979) 0.56          
  • Purple Finch 97 (1993) 0.78
  • Cassin’s Finch  5  (1993) 0.08 5
  • House Finch 5478 (1986) 0.95
  • Red Crossbill 35 (1997) 0.08
  • Pine Siskin 158 (1987) 0.47
  • Lesser Goldfinch 144 (1996) 0.87
  • Lawrence’s Goldfinch 60 (1974) 0.56
  • American Goldfinch 80 (1993) 0.74
  • Evening Grosbeak  2  (1984) 0.04
  • House Sparrow 182 (1993) 1

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