Blue-winged Warbler Golden-winged Warbler Tennessee Warbler Orange-crowned Warbler Nashville Warbler Virginia’s Warbler Colima Warbler Lucy’s Warbler Northern Parula Yellow Warbler (Vermivora cyanoptera) (Vermivora chrysoptera) (Oreothlypis peregrina) (Oreothlypis celata) (Oreothlypis ruficapilla) (Oreothlypis virginiae) (Oreothlypis crissalis) (Oreothlypis luciae) (Parula americana) (Dendroica petechia) Chestnut-sided Warbler Magnolia Warbler Cape May Warbler Black-throated Yellow-rumped Warbler Black-throated Golden-cheeked Warbler Black-throated Townsend’s Warbler Hermit Warbler (Dendroica pensylvanica) (Dendroica magnolia) (Dendroica tigrina) Blue Warbler (Dendroica coronata) Gray Warbler (Dendroica chrysoparia) Green Warbler (Dendroica townsendi) (Dendroica occidentalis) (Dendroica caerulescens) (Dendroica nigrescens) (Dendroica virens) Rosetta Stone for Warblers Blackburnian Warbler Yellow-throated Warbler Pine Warbler Kirtland’s Warbler Prairie Warbler Palm Warbler (Dendroica fusca) (Dendroica dominica) (Dendroica pinus) http://tinyurl.com/CLO-technology (Dendroica kirtlandii) (Dendroica discolor) (Dendroica palmarum) Bay-breasted Warbler Blackpoll Warbler Cerulean Warbler Black-and-white Warbler American Redstart Prothonotary Warbler Worm-eating Warbler Swainson’s Warbler Ovenbird Northern Waterthrush (Dendroica castanea) (Dendroica striata) (Dendroica cerulea) (Mniotilta varia) (Setophaga ruticilla) (Protonotaria citrea) (Helmitheros vermivorum) (Limnothlypis swainsonii) (Seiurus aurocapilla) (Parkesia noveboracensis) Louisiana Waterthrush Kentucky Warbler Connecticut Warbler Mourning Warbler MacGillivray’s Warbler Common Yellowthroat Hooded Warbler Wilson’s Warbler Canada Warbler Painted Redstart (Parkesia motacilla) (Oporornis formosus) (Oporornis agilis) (Oporornis philadelphia) (Oporornis tolmiei) (Geothlypis trichas) (Wilsonia citrina) (Wilsonia pusilla) (Wilsonia canadensis) (Myioborus pictus) Some spectrograms in this figure were generated from audio files recorded by William R. Evans and Michael O’Brien. Evans, W. R., and O’Brien, M. 2002. Flight calls of migratory birds: eastern North American landbirds. CD-ROM. Oldbird, Inc., Ithaca, NY. Photos courtesy of Danny Bales, Sarah Beckwith NPS, Roy Brown, Herbert Clark, David Cree, Gerry Dewaghe, Bill Dyer, Laura Erickson, Joan Gellatly, Michael J. Hopiak, Craig Kern, Mike McDowell, David McNicholas, Sharon Richards, Cameron Rognan, Ed Schneider, Van Truan. BirdScope Vol. 25 (2) Spring 2011.