The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • "IUCN Redlist of Threatened Species" (On-line). Accessed May 11, 2007 at http://www.iucnredlist.org/search/details.php/49951/summ.
  • 1996. database, NODC Taxonomic Code
  • 2005. website, AOU Check-List (07-2005)
  • 2006. website, Zoonomen - Zoological Nomenclature Resource, 2006.05.28
  • Ainsley, D. 1992. Vocalizations and nesting behaviour of the Pacific-slope Flycatcher, Empidonax difficilis. M.Sc. thesis, Univ. of Victoria, Victoria, BC.
  • American Ornithologists’ Union, 1998. Check-list of North American birds. Washington D.C.: American Ornithologists’ Union.
  • BBL - Longevity Records of North American Birds (Online source)   http://www.pwrc.usgs.gov/BBL/homepage/longvrec.htm External link.
  • Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes. 2003. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
  • Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes. 2003. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
  • Banks, R. C., R. W. McDiarmid, and A. L. Gardner. 1987. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. Resource Publication, no. 166
  • Banks, R. C., R. W. McDiarmid, and A. L. Gardner. 1987. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. Resource Publication, no. 166. 79
  • BirdLife International 2012. Empidonax difficilis
  • Campbell, R., N. Dawe, I. McTaggart-Cowan, J. Cooper, G. Kaiser. 1997. The birds of British Columbia. Vol. 3—Passerines: flycatchers through vireos. Victoria, Canada: R. Br. Columbia Mus..
  • Davis, J., G. Fisler, B. Davis. 1963. The breeding biology of the Western Flycatcher. Condor, 65: 337-382.
  • Gill, Frank, and Minturn Wright. 2006. Birds of the World: Recommended English Names
  • Gill, Frank, and Minturn Wright. 2006. Birds of the World: Recommended English Names. ix + 259
  • Lowther, P. 2005. "Pacific-slope Flycatcher" (On-line). The Birds of North America Online. Accessed May 11, 2007 at http://bna.birds.cornell.edu/BNA/account/Pacific-slope_Flycatcher/.
  • Orrell T. (custodian) (2013). ITIS Global: The Integrated Taxonomic Information System (version Sept 12). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.

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