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Bird Observations

			Date Range: Jan-Dec, 1900-2025

Occoquan Sewage Plant (UOSA)

Updated ~2 day(s) ago.

177 species (+25 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Greater White-fronted Goose
Cackling Goose
Canada Goose
Cackling/Canada Goose
Tundra Swan
swan sp.
Muscovy Duck
Wood Duck
Blue-winged Teal
Northern Shoveler
Gadwall
American Wigeon
Mallard
American Black Duck
Mallard x American Black Duck (hybrid)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mallard/American Black Duck
Northern Pintail
Green-winged Teal
Canvasback
Redhead
Ring-necked Duck
Greater Scaup
Lesser Scaup
Greater/Lesser Scaup
Aythya sp.
Surf Scoter
White-winged Scoter
Long-tailed Duck
Bufflehead
Common Goldeneye
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hooded Merganser
Common Merganser
Red-breasted Merganser
Common/Red-breasted Merganser
Ruddy Duck
duck sp.
Wild Turkey
Rock Pigeon
Mourning Dove
Yellow-billed Cuckoo
Black-billed Cuckoo
Yellow-billed/Black-billed Cuckoo
Common Nighthawk
Chimney Swift
Ruby-throated Hummingbird
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
American Coot
Killdeer
Short-billed Dowitcher
Wilson's Snipe
Spotted Sandpiper
Solitary Sandpiper
Lesser Yellowlegs
Least Sandpiper
Bonaparte's Gull
Laughing Gull
Ring-billed Gull
American Herring Gull
Great Black-backed Gull
gull sp.
Caspian Tern
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Forster's Tern
Sandwich Tern
tern sp.
Pied-billed Grebe
Horned Grebe
Red-necked Grebe
grebe sp.
Red-throated Loon
Common Loon
Double-crested Cormorant
Yellow-crowned Night Heron
Black-crowned Night Heron
Little Blue Heron
Green Heron
Great Egret
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Great Blue Heron
Black Vulture
Turkey Vulture
Osprey
Sharp-shinned Hawk
Cooper's Hawk
Sharp-shinned/Cooper's Hawk
Accipitrine hawk sp. (former Accipiter sp.)
Northern Harrier
Bald Eagle
Broad-winged Hawk
Red-shouldered Hawk
Red-tailed Hawk
Buteo sp.
hawk sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Great Horned Owl
Barred Owl
Belted Kingfisher
Yellow-bellied Sapsucker
Red-headed Woodpecker
Red-bellied Woodpecker
Downy Woodpecker
Hairy Woodpecker
Downy/Hairy Woodpecker
Pileated Woodpecker
Northern Flicker
American Kestrel
Merlin
Peregrine Falcon
falcon sp.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Eastern Wood-Pewee
Acadian Flycatcher
Empidonax sp.
Eastern Phoebe
Great Crested Flycatcher
Eastern Kingbird
Blue-headed Vireo
Warbling Vireo
Red-eyed Vireo
Blue Jay
American Crow
Fish Crow
American/Fish Crow
crow sp.
Common Raven
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Carolina Chickadee
Carolina/Black-capped Chickadee
Tufted Titmouse
Bank Swallow
Tree Swallow
Purple Martin
Northern Rough-winged Swallow
Barn Swallow
Cliff Swallow
swallow sp.
Ruby-crowned Kinglet
Golden-crowned Kinglet
White-breasted Nuthatch
Red-breasted Nuthatch
Brown Creeper
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Blue-gray Gnatcatcher
Northern House Wren
Winter Wren
Carolina Wren
European Starling
Gray Catbird
Brown Thrasher
Northern Mockingbird
Eastern Bluebird
Veery
Hermit Thrush
American Robin
Cedar Waxwing
House Sparrow
American Pipit
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
House Finch
Purple Finch
American Goldfinch
Chipping Sparrow
Field Sparrow
Fox Sparrow
Dark-eyed Junco
White-crowned Sparrow
White-throated Sparrow
Savannah Sparrow
Song Sparrow
Swamp Sparrow
Eastern Towhee
Yellow-breasted Chat
Eastern Meadowlark
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Orchard Oriole
Baltimore Oriole
Red-winged Blackbird
Brown-headed Cowbird
Rusty Blackbird
Common Grackle
blackbird sp.
Ovenbird
Black-and-white Warbler
Prothonotary Warbler
Nashville Warbler
Mourning Warbler
Common Yellowthroat
American Redstart
Cape May Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cerulean Warbler
Northern Parula
Magnolia Warbler
Bay-breasted Warbler
Blackburnian Warbler
Yellow Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Black-throated Blue Warbler
Palm Warbler
Pine Warbler
Yellow-rumped Warbler
Yellow-throated Warbler
Prairie Warbler
Black-throated Green Warbler
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
new world warbler sp.
Summer Tanager
Scarlet Tanager
Northern Cardinal
Rose-breasted Grosbeak
Blue Grosbeak
Indigo Bunting

KEY:| = insufficient data | = rare to widespread

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