Red-eyed Vireo (Vireo olivaceus)
Song: A tirelessly repeated series of warbled phrases with a short pause between each phrase. The male Red-eyed Vireo is famous for the tenacity of its singing. On May 27, 1952, Louise de Kiriline Lawrence followed a Red-eyed Vireo from dawn to dusk and counted its songs, a total of 22,197 (Kroodsma 2005).
Red-eyed Vireo song, May 16, 2010, Waukesha County, Wisconsin.
Kroodsma, D. E. 2005. The Singing Life of Birds. Houghton Mifflin Company, Boston, New York.