- Water Pipit
- Water Rail
- Weka
- Welcome Swallow
- Western Cattle Egret
- Western Marsh Harrier
- Western Sandpiper
- Western Swamphen
- Western Yellow Wagtail
- Whimbrel
- Whinchat
- White-breasted Waterhen
- White-browed Laughingthrush
- White-crowned Forktail
- White-faced Heron
- White-fronted Tern
- White-rumped Sandpiper
- White-shouldered Starling
- White-throated Dipper
- White Wagtail
- White Wagtail (yarrellii)
- Whitehead
- Willow Warbler
- Wilson's Snipe
- Wood Sandpiper
- Wrybill