- Water Rail
- Weka
- Welcome Swallow
- Western Bonelli's Warbler
- Western Cattle Egret
- Western House Martin
- Western Marsh Harrier
- Western Yellow Wagtail
- Whiskered Tern
- White-cheeked Pintail
- White-collared Swift
- White-eared Ground Sparrow
- White-faced Heron
- White-fronted Tern
- White-headed Woodpecker
- White-necked Jacobin
- White-throated Dipper
- White-throated Mountaingem
- White-tipped Dove
- White Stork
- White Wagtail
- Whitehead
- Whooper Swan
- Wild Turkey
- Willet
- Willow Tit
- Willow Warbler
- Wood Sandpiper
- Wood Stork