found: Work cat.: Curson, D.R. Western wood-pewees accept cowbird eggs, 1998, via Mountain West digital library, viewed Dec. 12, 2006:p. 90 (Western Wood-Pewee (Contopus sordidulus))
found: ITIS, Dec. 12, 2006(Contopus sordidulus P.L. Sclater, 1859 -- valid -- Western Wood-Pewee)
found: NatureServe explorer, via WWW, Dec. 12, 2006(Contopus sordidulus, Western Wood-Pewee. Previously called C. richardsoni (AOU 1998). Considered conspecific with C. virens by some authors (AOU 1983). Constitutes a superspecies with C. virens and C. cinereus (AOU 1998).)
found: The A.O.U. check-list of North American birds, 7th ed., via WWW, Dec. 12, 2006(Contopus sordidulus, Western Wood-Pewee)
found: Avibase : the world bird database, via WWW, Dec. 12, 2006(Western Wood-Pewee (Contopus sordidulus). Other synonyms: Large-billed Wood pewee, Short-legged Pewee, Western Pewee, Western Wood Pewee, Contopus richardsonii)
found: The Internet bird collection, Dec. 12, 2006(Contopus sordidulus, Western Wood-Pewee)
found: Banks, R.C. Obsolete English Names of North American Birds and Their Modern Equivalents, via WWW, Dec. 12, 2006(Contopus sordidulus. Obsolete names: short-legged pewee, large-billed wood pewee. Current name: western wood-pewee)
