- Wahlberg's Eagle
- Wallcreeper
- Warbling Vireo
- Water Pipit
- Water Rail
- Water Thick-knee
- Wattled Jacana
- Wattled Starling
- Wedge-billed Woodcreeper
- Wedge-tailed Shearwater
- West Peruvian Dove
- Western Banded Snake Eagle
- Western Barn Owl
- Western Black-eared Wheatear
- Western Bonelli's Warbler
- Western Capercaillie
- Western Cattle Egret
- Western Citril
- Western House Martin
- Western Jackdaw
- Western Kingbird
- Western Marsh Harrier
- Western Orphean Warbler
- Western Red-billed Hornbill
- Western Reef Heron
- Western Subalpine Warbler
- Western Swamphen
- Western Tanager
- Western Yellow Wagtail
- Whinchat
- Whiskered Tern
- White-backed Mousebird
- White-backed Vulture
- White-banded Swallow
- White-bearded Hermit
- White-bellied Antpitta
- White-bellied Canary
- White-bellied Drongo
- White-bellied Hummingbird
- White-bellied Mountaingem
- White-bellied Sea Eagle
- White-bellied Woodstar
- White-booted Racket-tail
- White-breasted Cormorant
- White-breasted Nuthatch
- White-breasted Waterhen
- White-browed Bulbul
- White-browed Chat-Tyrant
- White-browed Coucal
- White-browed Fantail
- White-browed Gnatcatcher
- White-browed Robin-Chat
- White-browed Scrub Robin
- White-browed Sparrow-Weaver
- White-capped Dipper
- White-cheeked Pintail
- White-collared Manakin
- White-collared Swift
- White-crowned Parrot
- White-crowned Sparrow
- White-eared Jacamar
- White-faced Whistling Duck
- White-fronted Amazon
- White-fronted Bee-eater
- White-fronted Ground Tyrant
- White-fronted Plover
- White-headed Barbet
- White-headed Buffalo Weaver
- White-headed Duck
- White-headed Mousebird
- White-headed Saw-wing
- White-headed Vulture
- White-lined Tanager
- White-lored Euphonia
- White-necked Jacobin
- White-ringed Flycatcher
- White-rumped Munia
- White-rumped Swift
- White-sided Flowerpiercer
- White-tailed Eagle
- White-tailed Shrike-Tyrant
- White-tailed Tropicbird
- White-tailed Tyrannulet
- White-thighed Swallow
- White-throated Bee-eater
- White-throated Canary
- White-throated Dipper
- White-throated Kingfisher
- White-throated Magpie-Jay
- White-throated Mountaingem
- White-throated Quail-Dove
- White-tipped Dove
- White-tufted Grebe
- White-tufted Sunbeam
- White-whiskered Hermit
- White-whiskered Puffbird
- White-winged Black Tyrant
- White-winged Coot
- White-winged Dove
- White-winged Snowfinch
- White-winged Swallow
- White-winged Tern
- White Stork
- White Tern
- White Wagtail
- White Wagtail (yarrellii)
- Whooper Swan
- Wild Turkey
- Willet
- Willow Tit
- Willow Warbler
- Wilson's Phalarope
- Winding Cisticola
- Wire-crested Thorntail
- Wire-tailed Manakin
- Wire-tailed Swallow
- Wood Duck
- Wood Sandpiper
- Wood Stork
- Woodchat Shrike
- Woodland Kingfisher
- Woodlark
- Wren-like Rushbird