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August/September 2004 Wildlife Inventory

There were many signs of fall migration throughout August and September. Both months were cooler and wetter than average. This may have contributed to an especially strong shorebird migration. Most of our reservoirs were so full that they had little shore, but flooded fields produced excellent shorebird habitat. Such was the case with the south eastern corner of the intersection between Jay Road and the Diagonal. This one spot produced many Kildeer, Lesser Yellowlegs, Solitary Sandpiper, Pectoral Sandpipers (last seen in 2002), Short-billed Dowitcher, Long-billed Dowitcher, Least Sandpiper, and 50 Wilson's Snipe. At Sombrero Marsh, the first Ruddy Turnstone since 1996 was reported. Another good spot for shorebirds was found in Erie, where a Sanderling was seen. Baird's Sandpiper was reported for the first time this year in August; it is not unusual for the first sighting to be during fall migration rather than in the spring.

Two Parasitic Jaegers were reported in September after a gap of four years. Gulls were counted in large numbers with populations of Franklin's Gulls and California Gulls changing daily. A Bonaparte'sGull was reported in August and three Sabine's Gulls in September. As well as the more common Forster's Tern, both Black Tern and Common Tern were reported. By the end of September, ducks were beginning to appear; only four duck species were reported in August but this had increased to thirteen duck species for September.

The cool weather seemed to mean that birders were more active than usual in the foothills and plains. Many observers went to Dowdy Draw. At least a dozen Sage Thrashers were reported there, as well as one Northern Mockingbird. The first Townsend's Warbler of the year was seen there, as well as a Nashville Warbler and AmericanRedstart. This was a good spot for finding lingering breeders such as Blue Grosbeak and Gray Catbird, as well as to find migrating warblers and sparrows. In other places, Blackpoll Warbler was new for the year; this is the first time we have had reports of this bird during fall migration. We also had the first report of the year for Cassin's Vireo; it seems to be easier to find this species during fall migration than in the spring. Other birds seen that are worth a mention are three of our less usual flycatchers: Least, Ash-throated and Cassin's Kingbird. A family of Orchard Orioles was found at White Rocks. Calliope Hummingbirds were seen in many places in both the plains and foothills, continuing the trend of the last few years.

Altogether 144 bird species were reported in August, and 175 in September. This is probably average for August, but undoubtedly lower than it might be because of lack of coverage. Surely there are more than four duck species present in the county? September's 175 species was by no means a record, but was higher than average. This was helped by good reporting early in the month of lingering summer birds. TOP


Birds
SPECIES August DATE(S) AREA(S) NO. September DATE(S) AREA(S) NO. OBSERVER
Canada Goose Present .... ... Present .... ... ...
Wood Duck 1,21,28 23,U 4 11,19 23,24 6 ...
Gadwall 20,21 22,23 13 19,25 2,23 15 ...
American Wigeon .... .... ... 11,18,19,25 2,23,24 39 ...
Mallard Present .... ... Present .... ... ...
Blue-winged Teal 21 23 4 19,25,27 2,6,23 12 TF(8)
Northern Shoveler .... .... ... 11,25 2,23 17 ...
Northern Pintail .... .... ... 19 23 3 TF
Green-winged Teal .... .... ... 25 2 6 TF
Redhead .... .... ... 28 22 5 TF
Ring-necked Duck .... .... ... 18,25,28 2,23 6 ...
Common Goldeneye .... .... ... 17 24 1 BSc
Hooded Merganser .... .... ... 4 25 1 TF
Common Merganser .... .... ... 4,11 25 5 TF
Wild Turkey a.m. 33,37 26 1,9 37 21 G&LM
Common Loon .... .... ... 11,17,18 24 1 ...
Pied-billed Grebe 1,3,7,21,28 22,23,U 12 11,18,19,25 2,23-25,U 30 ...
Horned Grebe .... .... ... 11 25 1 TF
Eared Grebe 7 22 1 4 25 1 SS(8),TF(9)
Western Grebe 7,13,15,28 20,22,U 67 1,4,11,16,25 24,25,U 532 ...
Clarks Grebe 15 U 3 4,18 25,U 3 BSc(8)
American White Pelican 4,13,14,28 11,20,23,U 52 1,11,25 2,10,24,U 30 ...
Double-crested Cormorant 13,14,21,28 11,20,23,U 17 11 23,24 18 ...
Great Blue Heron 7,13,14,21,28 2,11,20,22,23 9 11,25 2,11,23,24,U 7 ...
Great Egret 28 U 1 a.m. pl. 9 SFr(8)
Snowy Egret 28 U 1 .... .... ... SFr
Green Heron 31 23 1 1 23 1 JTa(8),DJW(9)
Black-crowned Night-Heron 14,21 11,23 6 1,19 23 2 ...
White-faced Ibis .... .... ... 10 16 2 EZ
Turkey Vulture a.m. pl.,ft. 57 1-19 pl.,ft. 27 ...
Osprey a.m. 11,13,20,22,23 15 a.m. 24,U 3 ...
Bald Eagle 1,7 23 1 2,4 24,46 2 ...
Northern Harrier 7 22 1 .... .... ... SS
Sharp-shinned Hawk .... .... ... 5 32,36 2 ...
Coopers Hawk 3,14,22 32,36,40 3 10 30 1 ABo(9)
Swainsons Hawk 7,21,24,28 20,22,23,32 5 1-18,27 6,10,20,23 5 ...
Red-tailed Hawk a.m. 20,22,32,33,35 15 a.m. pl.,ft. 14 ...
Ferruginous Hawk .... .... ... 30 13 1 BSc
Golden Eagle 26,28 33,37 3 9,11,27 17,29,33 3 ...
American Kestrel a.m. pl.,ft. 16 a.m. pl. 13 ...
Peregrine Falcon .... .... ... 5,11 20,23 2 ...
Prairie Falcon 1,28 23,33 2 5 36 1 JT
Virginia Rail 6 23 6 11,19 23 4 IS(8),TF(9)
Sora 7,10,21 23,24 3 8 16 1 EZ(9)
American Coot .... .... ... Present .... ... ...
Killdeer a.m. 11,20,22,23,33 38 a.m. pl. 50 ...
Greater Yellowlegs .... .... ... 18,19,22,25 6,23,29 4 ...
Lesser Yellowlegs 28 2 8 a.m. 6,21,23,24,U 62 ...
Solitary Sandpiper 3,6,18,21 23,24,32 5 4,10,11,19,26 16,21,23-25 10 ...
Spotted Sandpiper 6,21 23,24 5 19,22 6,23 2 ...
Ruddy Turnstone .... .... ... 22* 24 1 SP
Sanderling .... .... ... 21 6 1 DJW
Least Sandpiper 21 23 5 4,25,28 21,24,U 9 TF(8)
Bairds Sandpiper 21* 23 4 4,22,27,28 2,6,24 5 TF(8)
Pectoral Sandpiper .... .... ... 25*,27,28 21 3 NP*
Long-billed Dowitcher .... .... ... 22,29 6,21 7 ...
Short-billed Dowitcher .... .... ... 28* 21 1 Mbo*
Wilsons Snipe 21 23 3 22 6 1 TF(8),PPl(9)
Wilsons Phalarope .... .... ... 22 6 1 Ppl
Parasitic Jaeger .... .... ... 5*,28 22,U 2 SS*,JB*
Franklins Gull .... .... ... a.m. 22-24,U 209 ...
Bonapartes Gull 1 23 1 .... .... ... PPl
Ring-billed Gull 21 23 20 a.m. pl. 238 TF(8)
California Gull 21 23 5 11,17-19,29 22-25 1140 TF(8)
Sabines Gull .... .... ... 16*-18,22,28 22,25,U 3 BSc*
Common Tern .... .... ... 4*,8,18 16,24,U 9 BSc*,TF*
Forsters Tern 1,3,28 2,23 3 .... .... ... ...
Black Tern .... .... ... 4 24 1 BSc
Rock Pigeon Present .... ... Present .... ... ...
Band-tailed Pigeon a.m. 35 6 a.m. 35,46 7 SAO(8)
Eurasian Collared Dove .... .... ... 15,25 16,U 2 ...
Mourning Dove a.m. pl.,ft.,mt. 62 a.m. pl.,ft.,mt. 47 ...
Barn Owl 11,18 19,28 2 .... .... ... ...
Eastern Screech-Owl .... .... ... 19 23 2 TF,EZ
Great Horned Owl a.m. 20,23,33 5 a.m. 20,23,40,U 9 ...
Northern Pygmy-Owl .... .... ... 25,26 40 1 BK
Northern Saw-whet Owl 27 30 1 .... .... ... HE
Common Nighthawk a.m. pl.,ft.,mt. 15 .... .... ... ...
White-throated Swift 5,18,20 32,33 3 4,5,14,16 33,36,42 317 ...
Calliope Hummingbird a.m. pl.,ft. 8 4 25 1 BSc(9)
Broad-tailed Hummingbird a.m. thruout 34 a.m. pl.,ft.,mt. 35 ...
Rufous Hummingbird a.m. pl.,ft. 12 1-14 35 2 SAO(9)
Belted Kingfisher a.m. pl.,ft. 15 a.m. 2,20,23,33 9 ...
Red-naped Sapsucker .... .... ... 18 32 1 TF
Downy Woodpecker a.m. pl.,ft.,mt. 19 a.m. pl.,ft.,mt. 25 ...
Hairy Woodpecker a.m. 31,32,35,37,40 11 a.m. 35-37 7 ...
Am. Three-toed Woodpecker .... .... ... 9 46 1 LAG
N. (Red-shafted) Flicker Present .... ... Present .... ... ...
Olive-sided Flycatcher 21 23,32 2 .... .... ... ...
Western Wood-Pewee a.m. pl.,ft. 15 7,9,10,26 11,20,24,33 5 ...
Least Flycatcher .... .... ... 11,26 23 1 TF
Hammonds Flycatcher 23 32 1 1 32 1 BSp(8),TF(9)
Dusky Flycatcher .... .... ... 4 25 1 TF
Cordilleran Flycatcher a.m. 35N 4 4,5 32,36 2 SAO(8)
Ash-throated Flycatcher 6 32 1 .... .... ... IS
Says Phoebe 1-21 20,32 4 1,5,18 20,32 4 ...
Cassins Kingbird .... .... ... 4*,5 32 1 BSc*
Western Kingbird a.m. 20,22,26,32,33 14 4 32 1 BSc(9)
Eastern Kingbird a.m. pl.,ft. 36 27 15 1 PHa(9)
Loggerhead Shrike 28 33 1 7,27 20,29 2 SFr(8)
Plumbeous Vireo .... .... ... 9 33 2 TF
Cassins Vireo .... .... ... 9* 33 1 TF
Warbling Vireo 7 22 1 1,9,19 23,32,33,36 4 SS(8)
Red-eyed Vireo 14,15,23 32 2 14 33 1 BK
Gray Jay 7 46 1 2,9,11 37,46 4 GC,JTa(8)
Stellers Jay Present .... ... Present .... ... ...
Blue Jay a.m. 11,20,23,31,U 12 a.m. pl.,ft. 30 ...
Western Scrub-Jay 20,22 32,33 2 1,5,9 2,32,33 5 ...
Pinyon Jay 26 32 9 5,9 33,36 6 ...
Clarks Nutcracker 7,14 40,46 2 2,9 46 1 ...
Black-billed Magpie Present .... ... Present .... ... ...
American Crow a.m. 23,30A,32,35 100 a.m. 25,33,35,36 23 ...
Common Raven 7,14,18,21,22 11,23,30,32 7 1,2,4,5,9 30,32,36,46 11 ...
Horned Lark 6,28 20,U 4 18,25 24,U 6 ...
Violet-green Swallow a.m. 23,32,33,35,37 27 18 23 3 SS(9)
N. Rough-winged Swallow 14,21 11,23 21 .... .... ... ...
Bank Swallow 7,21 22,23 3 .... .... ... TF
Cliff Swallow a.m. 20,22,23,26 27 4 25 5 SS(9)
Barn Swallow a.m. pl. 42 1-25 17,23,25,33,U 174 ...
Black-capped Chickadee Present .... ... Present .... ... ...
Mountain Chickadee Present .... ... Present .... ... ...
Red-breasted Nuthatch a.m. 33,35 3 a.m. thruout 31 ...
White-breasted Nuthatch a.m. 13,20,31,32,35 9 a.m. pl.,ft. 44 ...
Pygmy Nuthatch a.m. 35,37 9 a.m. 32,36,37,46 27 ...
Brown Creeper 14 40 1 a.m. 23,32,36,46 19 ...
Rock Wren .... .... ... 11,13,18 24,26 3 ...
Canyon Wren 3,18,20 32,33,36 5 4,5 36,42 8 ...
House Wren a.m. pl.,ft.,mt. 44 1-19 pl.,ft.,mt. 18 ...
American Dipper 7 46 1 11 33 1 GC(8),SFr(9)
Golden-crowned Kinglet 7 46 1 9 46 1 JTa(8),LAG(9)
Ruby-crowned Kinglet 7 46 1 9,18,19 23,32,36,46 5 GC,JTa(8)
Blue-gray Gnatcatcher 15,17,18,20 26,32,33 11 5,13 26,32,36 13 ...
Western Bluebird a.m. 35,37,40 15 a.m. 35 5 SAO(9)
Mountain Bluebird a.m. 35,40 3 1,9 32,46 6 ...
Townsends Solitaire 17 26 1 9,19 36,37 2 LAG(8)
Swainsons Trush 3 36 1 9,14 25,33 3 TF,JS(8)
Hermit Thrush .... .... ... 9 36,46 4 ...
American Robin Present ... ... Present .... ... ...
Gray Catbird a.m. 15,26,32,33 7 1,4,5,9,11 32,33,36 11 ...
Northern Mockingbird 18 32 1 .... .... ... TF
Sage Thrasher 5,6,15,18,21 23,32 13 1,4,5 32,36 7 ...
European Starling Present .... ... Present .... ... ...
American Pipit 17 26 1 4,9,27 23,24,46 7 SJ,PPi(8)
Cedar Waxwing 1,14,15,18,21 23,32 77 1,5,19,27 23,32,36 16 ...
Orange-crowned Warbler 20,28 33 1 1,9,18,25 29,32,33 15 ...
Nashville Warbler 5,15 32 1 .... .... ... ...
Virginias Warbler 18,22,23 26,32 9 1,9 32,33 14 TF(9)
Yellow Warbler a.m. pl.,33 39 4,5,11 20,23,32,33 5 ...
Yellow-rumped Warbler a.m. 35N 20 a.m. pl.,ft.,alp. 62 SAO(8)
Townsends Warbler 22*,23 32 1 5,9,10 30,33,36 5 PHa*
Blackpoll Warbler 21* 23 1 4 25 1 TF
American Redstart 21 32 1 .... .... ... GE
MacGillivrays Warbler a.m. 20,23,32 6 1,4,11 32,33 2 ...
Common Yellowthroat 7,18,21,283 20,23,32,33 7 11,18,19 23,32 11 ...
Wilsons Warbler a.m. pl.,ft. 12 1-19 pl.,ft.,alp. 75 ...
Yellow-breasted Chat 5,18,23,28 32,33 5 1,5 32,36 3 ...
Western Tanager a.m. 20 ,32,33 7 a.m. pl.,ft.,mt. 9 ...
Green-tailed Towhee a.m. 20,25,26,32 13 1,4,13,16,18 23,26,32,36 9 ...
Spotted Towhee a.m. 25,26,32,37 32 a.m. pl.,ft.,mt. 60 ...
Chipping Sparrow a.m. 11,23,32,35. 61 a.m. pl.,ft. 162 ...
Clay-colored Sparrow .... .... ... 1,18 32 2 TF
Brewers Sparrow 6,18,21 32 5 1,4 32 5 ...
Vesper Sparrow a.m. 20,26,32,33,35 48 a.m. pl.,ft. 70 ...
Lark Sparrow a.m. 23,32,33 14 1,4,5,10,11 20,24,32 12 ...
Savannah Sparrow .... .... ... 10 20 2 LAG
Song Sparrow a.m. 11,23,32,33,36 19 a.m. 23,26,32,33,U 22 ...
Lincolns Sparrow .... .... ... 9-11,19,25 20,23,29,33 13 ...
White-crowned Sparrow .... .... ... 11,13,19,25 23,26,29,33,U 41 ...
Dark-eyed Junco .... .... ... 2,9,21 36,37,46 34 ...
Gray-headed Junco Present .... ... Present .... ... ...
Black-headed Grosbeak a.m. 25,31,32,37 21 1,16 32,36,37 5 ...
Blue Grosbeak a.m. 13,20,26,32 19 1,4,5,13 20,26,32,36 11 ...
Lazuli Bunting a.m. 20,32 12 1,4,5,11 32,33,36 23 ...
Red-winged Blackbird Present .... ... Present .... ... ...
Western Meadowlark Present .... ... Present .... ... ...
Yellow-headed Blackbird .... .... ... 4,25 2,24,U 102 ...
Brewers Blackbird a.m. 20,26 11 a.m. 20,23,25 120 ...
Common Grackle a.m. 2,11,20,23,31 58 a.m. pl. 268 ...
Great-tailed Grackle 14 23 2 8 16 1 EZ
Brown-headed Cowbird a.m. 20,26,32,35 21 a.m. 20,35 14 ...
Bullocks Oriole a.m. 20,23,32 12 1,7 20,32 4 ...
Orchard Oriole 4 13 4 .... .... ... SP
Pine Grosbeak .... .... ... 2,9 46 3 LAG
Cassins Finch a.m. 35N 12 a.m. 35 8 SAO
House Finch Present .... ... Present .... ... ...
Red Crossbill 7 46 1 9 46 18 JTa(8),LAG(9)
Pine Siskin a.m. 31,32,35,40 12 a.m. pl.,ft. 132 ...
Lesser Goldfinch a.m. pl.,ft.,mt. 43 a.m. pl.,ft. 78 ...
American Goldfinch a.m. pl.,ft.,mt. 76 a.m. pl.,ft. 64 ...
House Sparrow Present .... ... Present .... ... ...

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Mammals, Reptiles and Amphibians
SPECIES August DATE(S) AREA(S) NO. September DATE(S) AREA(S) NO. OBSERVER
Black Bear a.m. 30,35 2 a.m. 35,37 2 ...
Raccoon .... .... ... 20 31 2 AB
Red Fox a.m. 11,35 8 a.m. 35 5 SAO(9)
Coyote .... .... ... a.m. 20 3 LAG
Rock Squirrel 28 33 2 .... .... .... SFr
Black-tailed Prairie-Dog Present .... ... Present .... ... ...
Least Chipmunk a.m. 35,37 16 a.m. 35,37 19 ...
Chickaree a.m. 35 8 a.m. 35 10 SAO
Aberts Squirrel a.m. 35 2 .... .... ... SAO
Fox Squirrel Present .... ... Present .... ... ...
Vole Species .... .... ... 28 37 1 G&LM
House Mouse a.m. 35 4 a.m. 35 6 SAO
Snowshoe Hare .... .... ... 9* 46 2 LAG
Blacktail Jackrabbit 28* 33 1 .... .... ... SFr
Eastern Cottontail 28 33 8 .... .... ... SFr
Mountain Cottontail a.m. 35,37 5 .... .... ... SAO
Cottontail species .... .... ... 18 24 1 SS
Wapiti/Elk 16 37 1 .... .... ... G&LM
Mule Deer Present .... ... Present .... ... ...
White-tailed Deer 28 33 3 .... .... ... SFr
Eastern Fence Lizard 8 37 1 .... .... ... G&LM
Wandering Garter Snake .... .... ... 13,26 11,18,37 3 G&LM
Woodhouses Toad 14 11 1 18 23 1 SFr(8),SS(9)

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Contributors to the August/September 2004 Inventory:
Linda Andes-Georges, Julie Bartlett, Alan Bell, William Blackburn, Maggie Boswell, Andy Boyce, Alex & Gillian Brown, George Coffee, Raymond E. Davis, Helen Eisner, Gene Ellis, Ted Floyd, Steve Frye, Roy Halpin, Paula Hansley, Rachel Hopper, Steve Jones, Bill Kaempfer, D.W. King, Tony Leukering, Gene & Lynn Monroe, Sue A. Olmsted, Nathan Pieplow, Pam Piombino, Peter Plage, Suzi & Myron Plooster, Ira Sanders, Bill Schmoker, Wes Sears, Scott Severs, Jack Solomon, Bob Spencer, David Stewart, Joyce Takamine, John Tumasonis, David J. Waltman, Eric Zorawowicz. TOP