Remsen, J.V. 1976 Journal Union Reservoir, Weld Co., Colo. Oct. 24 Time: 1000-1200 Observers: same Wind: 0-5 Sky: P.C. Temp: 55-60 Species: Common Loon Arctic Loon Horned Grebe Eared Grebe Pied-billed Grebe Western Grebe Mallard Gadwall Redhead Bufflehead Ruddy Duck Northern Harrier Am. Avocet Common Goldeneye (first arr.) Ring-billed Gull Franklins Gull Bonapartels Gull Tree Swallow (late) Barn Swallow (late) Black-billed Magpie Horned Lark Water Pipit Northern Shrike Com. Yellowthroat (late) Savannah Sparrow Tree Sparrow Song Sparrow Evening Grosbeak 1 1 125 35 10 106 25 10 5 2 5 1 1 2 700+ 3 5 1 1 2 1 1 6 1 1 1 2 1 700+ 3 5 1 1 2 [cont] Baseline Reservoir, Boulder Co., Colo. (20 mins S. Larson) Common Loon Horned Grebe Western Grebe Gadwall Mallard Green-winged Teal Com. Goldeneye Bufflehead Killdeer Long-billed Dowitcher Ring-billed Gull Pine Siskin Am. Goldfinch 1 10 50 5 5 5 8 3 5 10 50 5 5 + Valmont Reservoir, Boulder Co., Colo.: Common Loon 1 Oct. 25 Barr Lake, Adams Co., Colo. Area: scanned duck flocks all the way around the lake looking for a ♀ Harlequin Duck seen yesterday by Robert Andrews but did not see it. This is the first report of the species in Colorado since 1940 or so and only the second in this century. Time: 0720-1235 Observers: Robert Andrews, Steve Larson, Barry Knapp, Bruce Bosley, John and Joyce Cooper Temp: 25-55 Sky: overcast to clear and sunny Wind: 0-2 Species: Horned Grebe Western Grebe White Pelican Canada Goose Mallard Gadwall N. Pintail Green-winged Teal Am. Wigeon N. Shoveler Redhead Ring-necked Duck Lesser Scaup Bufflehead Red-tailed Hawk Northern Harrier Prairie Falcon Am. Mestrel Am. Coot Killdeer Am. Golden Plover Black-bellied Plover Com. Snipe Pectoral Sandpiper Baird's Sandpiper Herring Gull Ring-billed Gull Franklins Gull Red-shafted Flicker Downy Woodpecker Barn Swallow (late) Black-billed Magpie Black-capped Chickadee Water Pipit Northern Shrike Mountain Bluebird Com. Starling W. Meadowlark Red-winged Blackbird Brewers Blackbird Lincoln's Sparrow 5 5 3 206 3000+ 1000+ 500+ 406+ 4000+ 400+ 2 3 4 1 3 4 1 1 400+ 15 1 6 1 2 10 1 15 15 2 1 1 15 1 8 1 1 50 5 500 5 1