- Wallcreeper
- Wandering Albatross
- Wandering Tattler
- Water Pipit
- Water Rail
- Wattled Jacana
- Waved Albatross
- Wedge-billed Woodcreeper
- Wedge-tailed Grass Finch
- Western Barn Owl
- Western Black-eared Wheatear
- Western Bonelli's Warbler
- Western Capercaillie
- Western Cattle Egret
- Western Fire-eye
- Western House Martin
- Western Jackdaw
- Western Marsh Harrier
- Western Orphean Warbler
- Western Rock Nuthatch
- Western Sandpiper
- Western Subalpine Warbler
- Western Swamphen
- Western Wood Pewee
- Western Woodhaunter
- Western Yellow Wagtail
- Western Yellow Wagtail (feldegg)
- Whinchat
- Whiskered Tern
- Whistling Heron
- White-backed Woodpecker
- White-banded Mockingbird
- White-banded Swallow
- White-banded Tyrannulet
- White-bearded Hermit
- White-bearded Manakin
- White-bellied Antpitta
- White-bellied Chachalaca
- White-bellied Cinclodes
- White-bellied Emerald
- White-bellied Hummingbird
- White-bellied Mountaingem
- White-bellied Parrot
- White-bellied Seedeater
- White-bellied Woodstar
- White-bellied Wren
- White-booted Racket-tail
- White-breasted Wood Wren
- White-bridled Finch
- White-browed Chat-Tyrant
- White-browed Conebill
- White-browed Gnatcatcher
- White-browed Ground Tyrant
- White-browed Tit-Spinetail
- White-capped Dipper
- White-capped Tanager
- White-cheeked Pintail
- White-chinned Jacamar
- White-chinned Petrel
- White-chinned Sapphire
- White-collared Jay
- White-collared Manakin
- White-collared Swift
- White-crested Elaenia
- White-crested Tyrannulet
- White-crowned Parrot
- White-eared Hummingbird
- White-eared Jacamar
- White-eared Puffbird
- White-eyed Attila
- White-eyed Foliage-gleaner
- White-faced Storm Petrel
- White-faced Whistling Duck
- White-fronted Ground Tyrant
- White-fronted Nunbird
- White-fronted Woodpecker
- White-headed Brushfinch
- White-headed Marsh Tyrant
- White-lined Tanager
- White-lored Antpitta
- White-naped Brushfinch (gutturalis)
- White-naped Xenopsaris
- White-necked Jacobin
- White-rimmed Warbler
- White-ruffed Manakin
- White-rumped Monjita
- White-rumped Sandpiper
- White-rumped Swift
- White-rumped Tanager
- White-sided Flowerpiercer
- White-sided Hillstar
- White-tailed Eagle
- White-tailed Hawk
- White-tailed Jay
- White-tailed Tyrannulet
- White-throated Daggerbill
- White-throated Dipper
- White-throated Earthcreeper
- White-throated Mountaingem
- White-throated Piping Guan
- White-throated Quail-Dove
- White-throated Spadebill
- White-throated Thrush
- White-throated Tyrannulet
- White-throated Xenops
- White-tipped Dove
- White-tipped Plantcutter
- White-tufted Grebe
- White-tufted Sunbeam
- White-whiskered Hermit
- White-whiskered Puffbird
- White-winged Black Tyrant
- White-winged Brushfinch
- White-winged Cinclodes
- White-winged Dove
- White-winged Guan
- White-winged Snowfinch
- White-winged Swallow
- White-winged Tern
- White Stork
- White Wagtail
- White Wagtail (yarrellii)
- Whooper Swan
- Willet
- Willow Ptarmigan
- Willow Tit
- Willow Warbler
- Wilson's Phalarope
- Wilson's Plover
- Wilson's Storm Petrel
- Wilson's Warbler
- Wing-barred Piprites
- Wire-crested Thorntail
- Wood Duck
- Wood Sandpiper
- Wood Stork
- Wood Thrush
- Wood Warbler
- Woodchat Shrike
- Woodlark
- Worm-eating Warbler
- Wren-like Rushbird