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| Type | Common Name | [Latin Name] |
| Wagtail | - Eastern Yellow Wagtail | [Motacilla tschutschensis] |
| Wagtail | - Forest Wagtail | [Dendronanthus indicus] |
| Wagtail | - Gray Wagtail | [Motacilla cinerea] |
| Wagtail | - Black-backed Wagtail | [Motacilla alba lugens] |
| Wagtail | - White Wagtail | [Motacilla alba] |
| Wagtail | - White Wagtail - Britain | [Motacilla alba yarrelli] |
| Warbler | - Arctic Warbler | [Phylloscopus borealis] |
| Warbler | - Bay-breasted Warbler | [Setophaga castanea] |
| Warbler | - Black-and-white Warbler | [Mniotilta varia] |
| Warbler | - Blackburnian Warbler | [Setophaga fusca] |
| Warbler | - Blackpoll Warbler | [Setophaga striata] |
| Warbler | - Black-throated Blue Warbler | [Setophaga caerulescens] |
| Warbler | - Black-throated Gray Warbler | [Setophaga nigrescens] |
| Warbler | - Black-throated Green Warbler | [Setophaga virens] |
| Warbler | - Blue-winged (Brewster's) Warbler | [Vermivora cyanoptera brewsteri] |
| Warbler | - Blue-winged Warbler | [Vermivora cyanoptera] |
| Warbler | - Canada Warbler | [Cardellina canadensis] |
| Warbler | - Cape May Warbler | [Setophaga tigrina] |
| Warbler | - Cerulean Warbler | [Setophaga cerulea] |
| Warbler | - Chestnut-capped Warbler | [Basileuterus delattrii] |
| Warbler | - Chestnut-sided Warbler | [Setophaga pensylvanica] |
| Warbler | - Common Reed Warbler | [Acrocephalus scirpaceus] |
| Warbler | - Connecticut Warbler | [Oporornis agilis] |
| Warbler | - Eastern Crowned Warbler | [Phylloscopus coronatus] |
| Warbler | - Fan-tailed Warbler | [Basileuterus lachrymosa] |
| Warbler | - Golden-cheeked Warbler | [Setophaga chrysoparia] |
| Warbler | - Golden-crowned Warbler | [Basileuterus culicivorus] |
| Warbler | - Golden-winged (Lawrence's) Warbler | [Vermivora chrysoptera lawrencei] |
| Warbler | - Golden-winged Warbler | [Vermivora chrysoptera] |
| Warbler | - Hermit Warbler | [Setophaga occidentalis] |
| Warbler | - Hooded Warbler | [Setophaga citrina] |
| Warbler | - Kentucky Warbler | [Geothlypis formosa] |
| Warbler | - Lanceolated Warbler | [Locustella lanceolata] |
| Warbler | - Lucy's Warbler | [Leiothlypis luciae] |
| Warbler | - MacGillivray's Warbler | [Geothlypis tolmiei] |
| Warbler | - Magnolia Warbler | [Setophaga magnolia] |
| Warbler | - Manchurian Bush Warbler | [Cettia canturians canturians] |
| Warbler | - Mourning Warbler | [Geothlypis philadelphia] |
| Warbler | - Nashville Warbler | [Leiothlypis ruficapilla] |
| Warbler | - Orange-crowned Warbler | [Leiothlypis celata] |
| Warbler | - Oriental Reed Warbler | [Acrocephalus orientalis] |
| Warbler | - Pale-legged Leaf Warbler | [Phylloscopus tenellipes] |
| Warbler | - Palm Warbler - Western | [Setophaga palmarum palmarum] |
| Warbler | - Pine Warbler | [Setophaga pinus] |
| Warbler | - Prairie Warbler | [Setophaga discolor] |
| Warbler | - Prothonotary Warbler | [Protonotaria citrea] |
| Warbler | - Rufous-capped Warbler | [Basileuterus rufifrons] |
| Warbler | - Sedge Warbler | [Acrocephalus schoenobaenus] |
| Warbler | - Swainson's Warbler | [Limnothlypis swainsonii] |
| Warbler | - Tennessee Warbler | [Leiothlypis peregrina] |
| Warbler | - Townsend's Warbler | [Setophaga townsendi] |
| Warbler | - Virginia's Warbler | [Leiothlypis virginiae] |
| Warbler | - Willow Warbler | [Phylloscopus trochilus] |
| Warbler | - Wilson's Warbler | [Cardellina pusilla] |
| Warbler | - Worm-eating Warbler | [Helmitheros vermivorum] |
| Warbler | - Yellow-browed Warbler | [Phylloscopus inornatus] |
| Warbler | - Yellow-rumped (Audubon's) Warbler | [Setophaga coronata auduboni] |
| Warbler | - Yellow-rumped (Myrtle) Warbler | [Setophaga coronata coronata] |
| Warbler | - Yellow-throated Warbler - Eastern | [Setophaga dominica dominica] |
| Warbler | - Yellow-throated Warbler - Western | [Setophaga dominica albilora] |
| Warbler | - Yellow Warbler | [Setophaga petechia] |
| Waterthrush | - Louisiana Waterthrush | [Parkesia motacilla] |
| Waterthrush | - Northern Waterthrush | [Parkesia noveboracensis] |
| Waxwing | - Cedar Waxwing | [Bombycilla cedrorum] |
| Wheatear | - Northern Wheatear - European | [Oenanthe oenanthe oenanthe] |
| Wheatear | - Northern Wheatear - Greenland | [Oenanthe oenanthe leucorhea] |
| Whimbrel | - Whimbrel - Asian | [Numenius phaeopus variegatus] |
| Whimbrel | - Whimbrel - European | [Numenius phaeopus phaeopus] |
| Whimbrel | - Whimbrel - North American | [Numenius phaeopus hudsonicus] |
| Whip-poor-will | - Eastern Whip-poor-will | [Antrostomus vociferus] |
| Whistling-Duck | - Black-bellied Whistling-Duck | [Dendrocygna autumnalis] |
| Whistling-Duck | - Fulvous Whistling-Duck | [Dendrocygna bicolor] |
| Wigeon | - American Wigeon | [Marecca americana] |
| Wigeon | - Eurasian Wigeon | [Marecca penelope] |
| Willet | - Willet | [Tringa semipalmata] |
| Willet | - Willet - Eastern | [Tringa semipalmata semipalmata] |
| Willet | - Willet - Western | [Tringa semipalmata inornata] |
| Woodcock | - American Woodcock | [Scolopax minor] |
| Woodcreeper | - Black-striped Woodcreeper | [Xiphorhynchus lachrymosus] |
| Woodcreeper | - Cocoa Woodcreeper | [Xiphorhynchus susurrans] |
| Woodnymph | - Violet-crowned Woodnymph | [Thalurania colombica] |
| Woodpecker | - Acorn Woodpecker | [Melanerpes formicivorus] |
| Woodpecker | - American Three-toed Woodpecker - Rockies | [Picoides dorsalis dorsalis] |
| Woodpecker | - American Three-toed Woodpecker - Western | [Picoides dorsalis fasciatus] |
| Woodpecker | - Arizona Woodpecker | [Dryobates arizonae] |
| Woodpecker | - Black-backed Woodpecker | [Picoides arcticus] |
| Woodpecker | - Black-cheeked Woodpecker | [Melanerpes pucherani] |
| Woodpecker | - Crimson-crested Woodpecker | [Campephilus melanoleucos] |
| Woodpecker | - Downy Woodpecker | [Dryobates pubescens] |
| Woodpecker | - Gila Woodpecker | [Melanerpes uropygialis] |
| Woodpecker | - Golden-fronted Woodpecker | [Melanerpes aurifrons] |
| Woodpecker | - Great Spotted Woodpecker | [Dendrocopus major] |
| Woodpecker | - Hairy Woodpecker - Eastern | [Dryobates villosus villosus] |
| Woodpecker | - Hairy Woodpecker - Western | [Dryobates villosus ??] |
| Woodpecker | - Japanese Pygmy Woodpecker | [Dendrocopus kizuki] |
| Woodpecker | - Ladder-backed Woodpecker | [Dryobates scalaris] |
| Woodpecker | - Lewis's Woodpecker | [Melanerpes lewis] |
| Woodpecker | - Lineated Woodpecker | [Dryocopus lineatus] |
| Woodpecker | - Nuttall's Woodpecker | [Dryobates nuttallii] |
| Woodpecker | - Pileated Woodpecker | [Dryocopus pileatus] |
| Woodpecker | - Red-bellied Woodpecker | [Melanerpes carolinus] |
| Woodpecker | - Red-cockaded Woodpecker | [Dryobates borealis] |
| Woodpecker | - Red-crowned Woodpecker | [Melanerpes rubricapillus] |
| Woodpecker | - Red-headed Woodpecker | [Melanerpes erythrocephalus] |
| Woodpecker | - White-headed Woodpecker | [Dryobates albolarvatus] |
| Wood-Pewee | - Eastern Wood-Pewee | [Contopus virens] |
| Wood-Pewee | - Western Wood-Pewee | [Contopus sordidulus] |
| Wood-Quail | - Black-fronted Wood-Quail | [Odontophorus atrifrons] |
| Wrentit | - Wrentit | [Chamaea fasciata] |
| Wren | - Bewick's Wren - California | [Thryomanes bewickii ??] |
| Wren | - Bewick's Wren - Texas | [Thryomanes bewickii cryptus] |
| Wren | - Bicolored Wren | [Campylorhynchus griseus] |
| Wren | - Cactus Wren | [Campylorhynchus brunneicapillus] |
| Wren | - Canyon Wren | [Catherpes mexicanus] |
| Wren | - Carolina Wren - Mexican | [Thryothorus ludovicianus lomitensis] |
| Wren | - Carolina Wren - Northern | [Thryothorus ludovicianus ludovicianus] |
| Wren | - Eurasian Wren - Great Britain | [Troglodytes troglodytes indigenus] |
| Wren | - Eurasian Wren - Shetland Islands | [Troglodytes troglodytes zetlandicus] |
| Wren | - Marsh Wren | [Cistothorus palustris] |
| Wren | - Northern House Wren - Eastern | [Troglodytes aedon aedon] |
| Wren | - Northern House Wren - Western | [Troglodytes aedon parkmannii] |
| Wren | - Pacific Wren | [Troglodytes pacificus] |
| Wren | - Rock Wren | [Salpinctes obsoletus] |
| Wren | - Sedge Wren | [Cistothorus stellarus] |
| Wren | - Southern House Wren | [Troglodytes musculus] |
| Wren | - White-headed Wren | [Campylorhynchus albobrunneus] |
| Wren | - Winter Wren | [Troglodytes hiemalis] |