W
- Wandering Tattler
- Warbling Vireo
- Western Bluebird
- Western Grebe
- Western Gull
- Western Kingbird
- Western Meadowlark
- Western Sandpiper
- Western Screech-Owl
- Western Scrub-Jay
- Western Tanager
- Western Wood-Pewee
- Whimbrel
- White Ibis
- White-breasted Nuthatch
- White-crowned Sparrow
- White-eyed Vireo
- White-faced Ibis
- White-headed Woodpecker
- White-rumped Sandpiper
- White-tailed Kite
- White-tailed Ptarmigan
- White-throated Sparrow
- White-throated Swift
- White-winged Crossbill
- White-winged Dove
- White-winged Scoter
- Whooping Crane
- Wild Turkey
- Willet
- Williamson's Sapsucker
- Willow Flycatcher
- Willow Ptarmigan
- Wilson's Phalarope
- Wilson's Plover
- Wilson's Snipe
- Wilson's Warbler
- Winter Wren
- Wood Duck
- Wood Thrush
- Worm-eating Warbler
- Wrentit