Grebes
Herons, Waders
Ducks, Geese
Hawks, etc.
Grouse, Quail, etc.
Cranes, Rails
Shorebirds
Gulls, Terns
Pigeons, Doves
Owls
Hummingbirds,
Swifts
Nighthawk
Kingfisher
Woodpeckers
Flycatchers
Vireos / Shrike
Crows, Jays
Larks
Swallows
Chickadees, Bushtit,
Wrentit
Nuthatches
Wrens / Dipper
Kinglet
Robin, Thrushes
Starling
Warblers
Tanager
Sparrows, Towhee
Finches, Grosbeaks
Blackbirds, Meadowlark

Owls

Great Horned Owl
GHOw_call_female01.wav, GHOw_call_female02.wav,
GHOw_duet01.wav (chickens in the background),
GHOw_juv_begging.wav, GHOw_juv_begging_2.wav

Western Screech Owl
WSOw-song01.wav, WSOw-song02.wav, WSOw_duet01.wav,
WS-Ow_frogs_GHOw.wav, WS-Ow_frogs-faint.wav, WS-Ow_frogs-loud.wav

Northern Saw-whet Owl
S-wOw_song01.wav, NS-wO_duet.wav, NS-wO_GHOw-faint.wav,
NS-wO_short.wav

Barred Owl
BaOw_call01.wav, BaOw_call01.wav, BaOw_S-wOw_02.wav (Saw-whet Owl in distant background)

Squirrels and chipmunks can sound like little owls, see:
Tricky Mammal Sounds and other critters