Results for San Mateo County ABC Bird-a-Thon
America’s Birdiest County 2007 and 2009 Comparison
The first year San Mateo County participated in America’s Birdiest County the 72 hour time period chosen was noon Friday, April 27, 2007 through noon Monday, April 30, 2007, this was the 17th week of the calendar year. There were 21 observers, 206 species recorded with 3 rarities described. The temperatures over this 72 hour period ranged from a high of 86 degrees to a low of 53 degrees.
The second year San Mateo County participated the 72 hour time period chosen was noon Friday, April 24, 2009 through noon Monday, April 27, 2009 this was the 17th week of the calendar year. There were 19 observers, 208 species recorded with 3 rarities described. The temperatures over this 72 hour period ranged from a high of 67 degrees to a low of 44 degrees.
Species heard or seen in 2007, including 3 rarities, that were not recorded in 2009 are: Greater White-fronted Goose; Redhead; Ring-necked Duck; White-winged Scoter; Osprey; Sora; Lesser Yellowlegs; Ruddy Turnstone; Heermann’s Gull; COMMON POORWILL; CALLIOPE HUMMINGBIRD; Cassin’s Vireo; Varied Thrush and LUCY’S WARBLER.
Species heard or seen in 2009, including 3 rarities, that were not recorded in 2007 are: Lesser Scaup; Hooded Merganser; Northern Fulmar; American White Pelican; CATTLE EGRET; Golden Eagle; Parasitic Jaeger; Mew Gull; Glaucous Gull; Black-legged Kittiwake; CASSIN’S AUKLET; Rufous Hummingbird; American Dipper; Chipping Sparrow; ROSE-BREASTED GROSBEAK and Red Crossbill.
— Leonie Batkin
| 2007 | 2009 | |
| Greater White-fronted Goose. | 1 | |
| Snow Goose. | ||
| Ross’s Goose. | ||
| Brant. | 1 | 1 |
| Cackling Goose. | ||
| Canada Goose. | 1 | 1 |
| Wood Duck. | 1 | 1 |
| Gadwall. | 1 | 1 |
| Eurasian Wigeon. | ||
| American Wigeon. | 1 | 1 |
| Mallard. | 1 | 1 |
| Blue-winged Teal. | 1 | 1 |
| Cinnamon Teal. | 1 | 1 |
| Northern Shoveler. | 1 | 1 |
| Northern Pintail. | 1 | 1 |
| Green-winged Teal. | 1 | 1 |
| Canvasback. | 1 | 1 |
| Redhead. | 1 | |
| Ring-necked Duck. | 1 | |
| Greater Scaup. | 1 | 1 |
| Lesser Scaup. | 1 | |
| Harlequin Duck. | 1 | 1 |
| Surf Scoter. | 1 | 1 |
| White-winged Scoter. | 1 | |
| Black Scoter. | 1 | 1 |
| Long-tailed Duck. | ||
| Bufflehead. | 1 | 1 |
| Common Goldeneye. | 1 | 1 |
| Barrow’s Goldeneye. | ||
| Hooded Merganser. | 1 | |
| Common Merganser. | 1 | 1 |
| Red-breasted Merganser. | 1 | 1 |
| Ruddy Duck. | 1 | 1 |
| Ring-necked Pheasant. | 1 | 1 |
| Wild Turkey. | 1 | 1 |
| California Quail. | 1 | 1 |
| Red-throated Loon. | 1 | 1 |
| Pacific Loon. | 1 | 1 |
| Common Loon. | 1 | 1 |
| Pied-billed Grebe. | 1 | 1 |
| Horned Grebe. | 1 | 1 |
| Red-necked Grebe. | ||
| Eared Grebe. | 1 | 1 |
| Western Grebe. | 1 | 1 |
| Clark’s Grebe. | 1 | 1 |
| Northern Fulmar. | 1 | |
| Pink-footed Shearwater | 1 | 1 |
| Sooty Shearwater. | 1 | 1 |
| American White Pelican. | 1 | |
| Brown Pelican. | 1 | 1 |
| Brandt’s Cormorant. | 1 | 1 |
| Double-crested Cormorant. | 1 | 1 |
| Pelagic Cormorant. | 1 | 1 |
| Great Blue Heron. | 1 | 1 |
| Great Egret. | 1 | 1 |
| 1 | ||
| Snowy Egret. | 1 | 1 |
| Green Heron. | 1 | 1 |
| Black-crowned Night-Heron. | 1 | 1 |
| Turkey Vulture. | 1 | 1 |
| Osprey. | 1 | |
| White-tailed Kite. | 1 | 1 |
| Bald Eagle. | ||
| Northern Harrier. | 1 | 1 |
| Sharp-shinned Hawk. | 1 | 1 |
| Cooper’s Hawk. | 1 | 1 |
| Red-shouldered Hawk. | 1 | 1 |
| Red-tailed Hawk. | 1 | 1 |
| Golden Eagle. | 1 | |
| American Kestrel. | 1 | 1 |
| Merlin. | 1 | 1 |
| Peregrine Falcon. | 1 | 1 |
| Clapper Rail. | 1 | 1 |
| Virginia Rail. | 1 | 1 |
| Sora. | 1 | |
| Common Moorhen. | ||
| American Coot. | 1 | 1 |
| Black-bellied Plover. | 1 | 1 |
| Snowy Plover. | 1 | 1 |
| Semipalmated Plover. | 1 | 1 |
| Killdeer. | 1 | 1 |
| Black Oystercatcher. | 1 | 1 |
| Black-necked Stilt. | 1 | 1 |
| American Avocet. | 1 | 1 |
| Greater Yellowlegs. | 1 | 1 |
| Lesser Yellowlegs. | 1 | |
| Willet. | 1 | 1 |
| Wandering Tattler. | 1 | 1 |
| Spotted Sandpiper. | 1 | 1 |
| Whimbrel. | 1 | 1 |
| Long-billed Curlew. | 1 | 1 |
| Marbled Godwit. | 1 | 1 |
| Ruddy Turnstone. | 1 | |
| Black Turnstone. | 1 | 1 |
| Surfbird. | 1 | 1 |
| Red Knot. | 1 | 1 |
| Sanderling. | 1 | 1 |
| Western Sandpiper. | 1 | 1 |
| Least Sandpiper. | 1 | 1 |
| Dunlin. | 1 | 1 |
| Short-billed Dowitcher. | 1 | 1 |
| Long-billed Dowitcher. | 1 | 1 |
| Wilson’s Snipe. | 1 | 1 |
| Red-necked Phalarope. | 1 | 1 |
| Pomarine Jaeger. | ||
| Parasitic Jaeger. | 1 | |
| Bonaparte’s Gull. | 1 | 1 |
| Heermann’s Gull. | 1 | |
| Mew Gull. | 1 | |
| Ring-billed Gull. | 1 | 1 |
| California Gull. | 1 | 1 |
| Herring Gull. | 1 | 1 |
| Thayer's Gull | 1 | 1 |
| Western Gull. | 1 | 1 |
| Glaucous-winged Gull. | 1 | 1 |
| Glaucous Gull | 1 | |
| Sabine’s Gull. | ||
| Black-legged Kittiwake. | 1 | |
| Caspian Tern. | 1 | 1 |
| Elegant Tern. | ||
| Forster’s Tern. | 1 | 1 |
| Black Skimmer. | 1 | 1 |
| Common Murre. | 1 | 1 |
| Pigeon Guillemot. | 1 | 1 |
| Marbled Murrelet. | 1 | 1 |
| Ancient Murrelet | ||
| 1 | ||
| Rhinoceros Auklet. | 1 | 1 |
| Rock Pigeon. | 1 | 1 |
| Band-tailed Pigeon. | 1 | 1 |
| Eurasian Collared-Dove. | 1 | 1 |
| Mourning Dove. | 1 | 1 |
| Barn Owl. | 1 | 1 |
| Western Screech-Owl. | 1 | 1 |
| Great Horned Owl. | 1 | 1 |
| Northern Pygmy-Owl | 1 | 1 |
| Burrowing Owl. | ||
| Long-eared Owl. | ||
| Short-eared Owl. | ||
| Northern Saw-whet Owl | 1 | 1 |
| COMMON POORWILL | 1 | |
| Vaux’s Swift. | 1 | 1 |
| White-throated Swift. | 1 | 1 |
| Anna’s Hummingbird. | 1 | 1 |
| CALLIOPE HUMMINGBIRD | 1 | |
| Rufous Hummingbird. | 1 | |
| Allen’s Hummingbird. | 1 | 1 |
| Belted Kingfisher. | 1 | 1 |
| Acorn Woodpecker. | 1 | 1 |
| Red-breasted Sapsucker. | ||
| Nuttall's Woodpecker. | 1 | 1 |
| Downy Woodpecker. | 1 | 1 |
| Hairy Woodpecker | 1 | 1 |
| Northern Flicker. | 1 | 1 |
| Pileated Woodpecker. | 1 | 1 |
| Olive-sided Flycatcher. | 1 | 1 |
| Western Wood-Pewee. | 1 | 1 |
| Hammond's Flycatcher. | ||
| Pacific-slope Flycatcher. | 1 | 1 |
| Black Phoebe. | 1 | 1 |
| Say's Phoebe. | ||
| Ash-throated Flycatcher. | 1 | 1 |
| Western Kingbird. | 1 | 1 |
| Loggerhead Shrike. | ||
| Cassin's Vireo. | 1 | |
| Hutton’s Vireo. | 1 | 1 |
| Warbling Vireo. | 1 | 1 |
| Steller’s Jay. | 1 | 1 |
| Western Scrub-Jay. | 1 | 1 |
| American Crow. | 1 | 1 |
| Common Raven. | 1 | 1 |
| Horned Lark. | ||
| Purple Martin. | ||
| Tree Swallow. | 1 | 1 |
| Violet-green Swallow. | 1 | 1 |
| Northern Rough-winged Swallow. | 1 | 1 |
| Bank Swallow. | 1 | 1 |
| Cliff Swallow. | 1 | 1 |
| Barn Swallow. | 1 | 1 |
| Chestnut-backed Chickadee. | 1 | 1 |
| Oak Titmouse. | 1 | 1 |
| Bushtit. | 1 | 1 |
| Red-breasted Nuthatch. | 1 | 1 |
| White-breasted Nuthatch. | 1 | 1 |
| Pygmy Nuthatch. | 1 | 1 |
| Brown Creeper. | 1 | 1 |
| Rock Wren | ||
| Bewick’s Wren. | 1 | 1 |
| House Wren. | 1 | 1 |
| Winter Wren. | 1 | 1 |
| Marsh Wren. | 1 | 1 |
| American Dipper. | 1 | |
| Golden-crowned Kinglet. | 1 | 1 |
| Ruby-crowned Kinglet. | 1 | 1 |
| Blue-gray Gnatcatcher. | 1 | 1 |
| Western Bluebird. | 1 | 1 |
| Swainson’s Thrush. | 1 | 1 |
| Hermit Thrush. | 1 | 1 |
| American Robin. | 1 | 1 |
| Varied Thrush. | 1 | |
| Wrentit. | 1 | 1 |
| Northern Mockingbird. | 1 | 1 |
| California Thrasher. | 1 | 1 |
| European Starling. | 1 | 1 |
| American Pipit. | 1 | 1 |
| Cedar Waxwing. | 1 | 1 |
| Orange-crowned Warbler. | 1 | 1 |
| Nashville Warbler. | ||
| LUCY'S WARBLER | 1 | |
| Yellow Warbler. | 1 | 1 |
| Yellow-rumped Warbler. | 1 | 1 |
| Black-throated Gray Warbler. | 1 | 1 |
| Townsend’s Warbler. | 1 | 1 |
| Hermit Warbler. | 1 | 1 |
| Palm Warbler. | ||
| MacGillivray’s Warbler. | 1 | 1 |
| Common Yellowthroat. | 1 | 1 |
| Wilson’s Warbler. | 1 | 1 |
| Western Tanager. | 1 | 1 |
| Spotted Towhee. | 1 | 1 |
| California Towhee. | 1 | 1 |
| Chipping Sparrow. | 1 | |
| Lark Sparrow. | ||
| Savannah Sparrow. | 1 | 1 |
| Grasshopper Sparrow. | 1 | 1 |
| Fox Sparrow. | 1 | 1 |
| Song Sparrow. | 1 | 1 |
| Lincoln’s Sparrow. | 1 | 1 |
| White-throated Sparrow | 1 | 1 |
| White-crowned Sparrow. | 1 | 1 |
| Golden-crowned Sparrow. | 1 | 1 |
| Dark-eyed Junco. | 1 | 1 |
| Black-headed Grosbeak. | 1 | 1 |
| 1 | ||
| Lazuli Bunting. | 1 | 1 |
| Red-winged Blackbird. | 1 | 1 |
| Tricolored Blackbird. | ||
| Western Meadowlark. | 1 | 1 |
| Brewer’s Blackbird. | 1 | 1 |
| Brown-headed Cowbird. | 1 | 1 |
| Hooded Oriole. | 1 | 1 |
| Bullock's Oriole. | 1 | 1 |
| Purple Finch. | 1 | 1 |
| House Finch. | 1 | 1 |
| Red Crossbill. | 1 | |
| Pine Siskin. | 1 | 1 |
| Lesser Goldfinch. | 1 | 1 |
| Lawrence’s Goldfinch. | ||
| American Goldfinch. | 1 | 1 |
| House Sparrow. | 1 | 1 |
| Totals | 206 | 208 |
June 11, 2009