Monthly Bird Movement in Stanislaus County
Late February:
Arrivals: Violet-green Swallow, Cliff Swallow
Early March
Arrivals: Swainson’s Hawk (rW), Northern Rough-winged Swallow, Barn Swallow (rW)
Mid March
Arrivals: Caspian Tern (rW)
Departures: Cackling Goose, Short-eared owl
Late March
Arrivals: Western Sandpiper (uW), Pacific-slope Flycatcher (rW), Western Kingbird, Wilson's Warbler, Grasshopper Sparrow, Bullock's Oriole
Departures: Snow Goose, Ross’s Goose, Common Merganser, Rough-legged Hawk, Ferruginous Hawk, Bald Eagle, Varied Thrush, Golden-crowned Kinglet
Early April
Arrivals: Semipalmated Plover (rW), Whimbrel, Forster’s Tern (rW), Ash-throated Flycatcher, Warbling Vireo, Blue-Gray Gnatcatcher (uW), Western Tanager (rW), Black-headed Grosbeak, Hooded Oriole
Departures: Greater White-fronted Goose, Northern Pintail, Green-winged Teal, Ring-necked Duck, Lesser Scaup, Herring Gull, Mountain Bluebird,
Mid April
Arrivals: Lesser Yellowlegs, Wilson’s Phalarope, Red-necked Phalarope, Black Tern, Caspian Tern, Lesser Nighthawk (uS*), Common Poorwill, Vaux's Swift, Rufous Hummingbird, Olive-sided Flycatcher, Western Wood-Pewee, Cassin's Vireo, Swainson's Thrush, Yellow Warbler, Black-throated Gray Warbler, Chipping Sparrow (uW), Blue Grosbeak, Lazuli Bunting
Departures: Gadwall (uS*), Bufflehead, Sharp-shinned Hawk, Pacific Golden-Plover, Bonaparte's Gull, Red-breasted Sapsucker, Say's Phoebe, Brown Creeper, Hermit Thrush, Vesper Sparrow
Late April
Arrivals: Merlin, Black-chinned Hummingbird, Olive-sided Flycatcher, Willow Flycatcher, Yellow-breasted Chat
Departures: Eared Grebe, Green-winged Teal, Canvasback, Common Goldeneye, American Wigeon, Northern Shoveler, Ruddy Duck, American Coot (uS), Black-bellied Plover, Long-billed Curlew, Ruby-crowned Kinglet, Fox Sparrow, Lincoln's Sparrow, White-throated Sparrow, Purple Finch, Pine Siskin
Early May
Departures: Snowy Egret (uS*), Cattle Egret (uS*), Greater Yellowlegs, Lesser Yellowlegs, Whimbrel, Spotted Sandpiper, Least Sandpiper, Lewis’s Woodpecker, American Pipit, Yellow-rumped Warbler, Savannah Sparrow, White-crowned Sparrow, Dark-eyed Junco, Golden-crowned Sparrow
Mid May
Departures: American White Pelican (uS), Semipalmated Plover, Western Sandpiper, Dunlin, Long-billed Dowitcher, Wilson's Snipe (uS*), Wilson’s Phalarope, Red-necked Phalarope, Ring-billed Gull, California Gull, Black Tern, Caspian Tern, Lesser Nighthawk (uS*), Vaux’s Swift, Olive-sided Flycatcher, Western Wood-Pewee, Cassin’s Vireo, Blue-Gray Gnatcatcher, Swainson’s Thrush, Orange-crowned Warbler, Nashville Warbler, Yellow Warbler (uS*), Black-throated Gray Warbler, Townsend's Warbler, Hermit Warbler, MacGillvray’s Warbler, Wilson’s Warbler, Western Tanager.
Late May
Departures: Cedar Waxwing
Early July
Arrivals: Greater Yellowlegs
Mid July
Arrivals: Lesser Yellowlegs, Western Sandpiper, Least Sandpiper, Short-billed Dowitcher, Wilson’s Phalarope, California Gull
Late July
Arrivals: American White Pelican (uS), Spotted Sandpiper, Red-necked Phalarope, Caspian Tern, Rufous Hummingbird
Early August
Arrivals: Eared Grebe, Northern Shoveler, Long-billed Dowitcher, Ring-billed Gull, Western Tanager
Mid August
Arrivals: Snowy Egret (uS*), Green-winged Teal, Semipalmated Plover, Pacific Golden-Plover, Wilson's Phalarope, Red-necked Phalarope, Bonaparte's Gull, Warbling Vireo, Blue-Gray Gnatcatcher, Orange-crowned Warbler
Late August
Arrivals: American Wigeon, Wilson's Snipe, Lesser Nighthawk (uS*), Olive-sided Flycatcher, Cassin’s Vireo, Swainson’s Thrush, Townsend's Warbler
Early September
Arrivals: Canvasback, Black Tern, Vaux’s Swift, Cedar Waxwing, Grasshopper Sparrow, Purple Finch
Mid September
Arrivals: Cattle Egret (uS*), Ring-necked Duck, Sandhill Crane, Dunlin, Red-breasted Sapsucker, Say's Phoebe, Ruby-crowned Kinglet, American Pipit, Vesper Sparrow, Fox Sparrow, Lincoln's Sparrow, White-throated Sparrow, White-crowned Sparrow, Golden-crowned Sparrow
Departures: Western Kingbird, Ash-throated Flycatcher, Black-headed Grosbeak, Blue Grosbeak, Bullock's Oriole
Late September
Arrivals: Bufflehead, Common Goldeneye, Herring Gull, Hermit Thrush, Varied Thrush
Departures: Lesser Nighthawk, Black-chinned Hummingbird, Olive-sided Flycatcher, Violet-Green Swallow, Cliff Swallow, Swainson’s Thrush, Lazuli Bunting, Hooded Oriole
Early October
Departures: Wilson's Phalarope, Common Poorwill, Vaux’s Swift, Olive-sided Flycatcher, Western Wood-Pewee, Cassin’s Vireo, Warbling Vireo, Western Tanager (rW)
Mid October
Arrivals: Short-eared Owl, Herring Gull, Golden-crowned Kinglet, Pine Siskin (highly irruptive)
Departures: Western Sandpiper (uW), Forster’s Tern, Caspian Tern, Black Tern, Vaux's Swift, Pacific-slope Flycatcher, Northern Rough-winged Swallow, Swainson's Thrush, Yellow Warbler, Townsend’s Warbler (uW), Black-throated Gray Warbler (uW), Chipping Sparrow (uW)
Late October
Departures: Costa’s Hummingbird, Wilson's Warbler, Western Tanager (rW)
Arrivals: Rough-legged Hawk, Bald Eagle, Ferruginous Hawk, Merlin, Brown Creeper, Mountain Bluebird
Early November
Departures: Barn Swallow (rW)