Deciduous trees, primarily along the mainland rivers of southeastern Alaska (Armstrong 2008). Also breeds in mixed forests and sometimes in upland areas away from water (Gardali and Ballard 2000). At lower elevations, prefers taller, larger trees in riparian areas, such as around ponds, sloughs, wet meadows, and lagoons, and at the edge of forest clearings. Also breeds in parks and along treed roads in suburban areas (Campbell et al. 1997).
Armstrong, R. H. 2008. Guide to the birds of Alaska. 5th edition. Alaska Northwest Books, Anchorage, AK. 360 pp.
Campbell, R. W., N. K. Dawe, I. McTaggart-Cowan, J. M. Cooper, G. W. Kaiser, M. C. E. McNall, and G. E. J. Smith. 1997. The Birds of British Columbia. Volume 3. Passerines: flycatchers through vireos. University of British Columbia Press, Vancouver. 693 pages.
Gardali, T. and G. Ballard. 2000. Warbling Vireo (Vireo gilvus). In The Birds of North America, No. 551 (A. Poole and F. Gill, Eds.). Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union.