Birds of Pennsylvania by B.H. Warren

Vesper Sparrow

White Bellied Swallow

White Breasted Nut Hatch

White Throated Sparrow

Wild Goose

Wild Pigeon

Wild Turkey

Wilson's Snipe

Winter Wren

Wood Duck

Wood Thrush

Yellow Bellied Sapsucker

Yellow Billed Cuckoo

Yellow Throated Vireo

Yellow Warbler