Richard K. Walton ; Robert W. Lawson Related books Birding by Ear Houghton Mifflin • 1999 Birding by Ear: Eastern/Central (Peterson Audios) Houghton Mifflin • 1999 Birding by Ear: Western North America (Peterson Field Guide Audio Series) Houghton Mifflin • 1999 More Birding by Ear Houghton Mifflin • 1999 Peterson Field Guide(R) to Eastern/Central Birding by Ear Houghton Mifflin • 1994 Peterson Field Guides: Backyard Bird Song [Audiobook] [Audio CD] Houghton Mifflin • 1999