- Wandering Tattler
- Warbling Vireo
- Water Pipit
- Water Rail
- Wattled Jacana
- Waved Woodpecker
- Western Black-eared Wheatear
- Western Bluebird
- Western Bonelli's Warbler
- Western Cattle Egret
- Western Flycatcher
- Western Grebe
- Western Gull
- Western House Martin
- Western Jackdaw
- Western Kingbird
- Western Marsh Harrier
- Western Orphean Warbler
- Western Reef Heron
- Western Sandpiper
- Western Subalpine Warbler
- Western Swamphen
- Western Yellow Wagtail
- Western Yellow Wagtail (cinereocapilla)
- Whinchat
- Whiskered Tern
- White-bellied Erpornis
- White-bellied Sea Eagle
- White-bellied Woodstar
- White-booted Racket-tail
- White-breasted Nuthatch
- White-breasted Waterhen
- White-browed Crake
- White-capped Tanager
- White-chested Babbler
- White-collared Manakin
- White-crested Laughingthrush
- White-crowned Sparrow
- White-crowned Wheatear
- White-eared Bulbul
- White-eyed Vireo
- White-faced Ibis
- White-faced Plover
- White-fronted Amazon
- White-headed Marsh Tyrant
- White-lined Tanager
- White-lored Warbler
- White-naped Brushfinch
- White-necked Jacobin
- White-ruffed Manakin
- White-rumped Sandpiper
- White-rumped Shama
- White-sided Flowerpiercer
- White-spectacled Bulbul
- White-tailed Eagle
- White-tailed Kite
- White-throated Dipper
- White-throated Fantail
- White-throated Kingfisher
- White-throated Magpie-Jay
- White-throated Quail-Dove
- White-throated Sparrow
- White-throated Tyrannulet
- White-throated Xenops
- White-tipped Dove
- White-vented Plumeleteer
- White-whiskered Puffbird
- White-winged Dove
- White-winged Snowfinch
- White-winged Swallow
- White-winged Tern
- White Stork
- White Wagtail
- Whooping Motmot
- Willet
- Willow Ptarmigan
- Willow Tit
- Willow Warbler
- Wilson's Phalarope
- Wilson's Plover
- Wilson's Snipe
- Wilson's Warbler
- Wing-barred Seedeater
- Wood Duck
- Wood Sandpiper
- Wood Stork
- Wood Thrush
- Woodchat Shrike
- Woodhouse's Scrub Jay
- Wrentit