- Wallcreeper
- Warbling Doradito
- Warbling Vireo
- Water Pipit
- Water Rail
- Water Thick-knee
- Wattled Jacana
- Wedge-tailed Hillstar
- Western Barn Owl
- Western Bonelli's Warbler
- Western Capercaillie
- Western Cattle Egret
- Western Jackdaw
- Western Marsh Harrier
- Western Olivaceous Warbler
- Western Orphean Warbler
- Western Osprey
- Western Rock Nuthatch
- Western Swamphen
- Western Yellow Wagtail
- Whimbrel
- Whimbrel (hudsonicus)
- Whinchat
- Whiskered Tern
- Whistling Heron
- White-backed Stilt
- White-backed Vulture
- White-backed Woodpecker
- White-banded Mockingbird
- White-bearded Manakin
- White-bellied Hummingbird
- White-bellied Minivet
- White-breasted Cormorant
- White-breasted Nuthatch
- White-breasted Waterhen
- White-browed Blackbird
- White-browed Brushfinch
- White-browed Robin-Chat
- White-browed Scrub Robin
- White-browed Wagtail
- White-cheeked Pintail
- White-collared Swift
- White-crested Helmetshrike
- White-crested Tyrannulet
- White-eared Barbet
- White-eared Bulbul
- White-faced Ibis
- White-faced Whistling Duck
- White-fronted Bee-eater
- White-fronted Plover
- White-fronted Woodpecker
- White-headed Duck
- White-necked Raven
- White-rumped Sandpiper
- White-rumped Swift
- White-sided Hillstar
- White-tailed Eagle
- White-tailed Kite
- White-throated Dipper
- White-throated Kingfisher
- White-throated Sparrow
- White-tipped Dove
- White-tipped Plantcutter
- White-tufted Grebe
- White-vented Violetear
- White-winged Cinclodes
- White-winged Coot
- White-winged Scoter
- White-winged Snowfinch
- White-winged Swallow
- White-winged Tern
- White-winged Widowbird
- White Monjita
- White Stork
- White Wagtail
- Whooper Swan
- Willow Ptarmigan
- Willow Tit
- Willow Warbler
- Wilson's Phalarope
- Wilson's Snipe
- Wire-tailed Swallow
- Wood Duck
- Wood Sandpiper
- Wood Stork
- Wood Warbler
- Woodchat Shrike
- Woodlark
- Woolly-necked Stork