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Bird Observations

			Date Range: Jan, 1900-2022

Castle Island and Pleasure Bay

Updated ~32 hr(s) ago.

67 species (+17 other taxa)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Ross's Goose
Brant
Canada Goose
Mute Swan
Mallard
American Black Duck
Mallard x American Black Duck (hybrid)
Mallard/American Black Duck
Greater Scaup
Lesser Scaup
Greater/Lesser Scaup
Common Eider
Surf Scoter
White-winged Scoter
Black Scoter
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Surf/Black Scoter
scoter sp.
Long-tailed Duck
Bufflehead
Common Goldeneye
Barrow's Goldeneye
Red-breasted Merganser
Common/Red-breasted Merganser
duck sp.
Horned Grebe
Red-necked Grebe
Rock Pigeon
Mourning Dove
Ruddy Turnstone
Sanderling
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Dunlin
Purple Sandpiper
shorebird sp.
Razorbill
alcid sp.
Ring-billed Gull
Herring Gull
Great Black-backed Gull
Lesser Black-backed Gull
Iceland Gull
gull sp.
Red-throated Loon
Common Loon
loon sp.
Great Cormorant
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Double-crested Cormorant
cormorant sp.
Great Blue Heron
Turkey Vulture
Northern Harrier
Cooper's Hawk
Bald Eagle
Red-tailed Hawk
Buteo sp.
hawk sp.
Snowy Owl
Downy Woodpecker
American Kestrel
Merlin
Peregrine Falcon
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
falcon sp.
Blue Jay
American Crow
Common Raven
Black-capped Chickadee
Horned Lark
White-breasted Nuthatch
Carolina Wren
European Starling
Northern Mockingbird
Hermit Thrush
American Robin
House Sparrow
House Finch
American Goldfinch
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Snow Bunting
American Tree Sparrow
Dark-eyed Junco
White-throated Sparrow
Savannah Sparrow
Song Sparrow
new world sparrow sp.
Northern Cardinal
passerine sp.

KEY:| = insufficient data | = rare to widespread