The Pacific-slope flycatcher is a small insectivorous bird of the family Tyrannidae. It is native to coastal regions of western North America, including the Pacific Ocean and the southern Gulf of California, as far north as British Columbia and southern Alaska, but is replaced in the inland regions by the Cordilleran flycatcher. These two species were classified as a single species, commonly called the western flycatcher, by the American Ornithologists’ Union until 1989. In winter, both species migrate south to Mexico, where they are virtually indistinguishable from one another. Source: Wikipedia
Citation:
Baird, SF 1858
Reference:
Rep. Explor. Surv. Railr. Mississ. Pacif.
9 p.198
Protonym:
Empidonax difficilis
Type locality:
west coast of United States, Fort Steilacoom, Shoalwater Bay, Washington, Fort Tejon, California; restricted to Fort Steilacoom, Washington by Brodkorb, 1949, Condor, 51, p. 39.
Link:
https://biodiversitylibrary.org/page/11689398
Avibase ID:
44A2028364A252A6
Avibase ID:
avibase-44A20283
Short link:
https://avibase.ca/44A20283
Taxonomic Serial Number:
TSN: 178349
Geographic range:
Authorities recognizing this taxonomic concept:
American Ornithologists' Union 2nd edition (incl. 14th suppl.): Western Flycatcher ( Empidonax difficilis) |
American Ornithologists' Union 2nd edition (incl. 15th suppl.): Western Flycatcher ( Empidonax difficilis) |
American Ornithologists' Union 6th edition (incl. 37th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 6th edition (incl. 38th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 6th edition (incl. 39th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 6th edition (incl. 40th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 6th edition (incl. 41st suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (1998): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 42nd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 43rd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 44th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 45th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 46th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 47th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 48th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 49th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 50th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 51st suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 52nd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 53rd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 54th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 55th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 56th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Union 7th edition (incl. 57th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 58th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 59th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 60th suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 61st suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 61st suppl. and addendum): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 62nd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
American Ornithologists' Society 7th edition (incl. 63rd suppl.): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts (current): Western Flycatcher ( Empidonax difficilis [difficilis]) |
Avibase taxonomic concepts v. 2023 (May 2023): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 01 (August 2013): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 02 (May 2014): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 03 (March 2015): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 04 (Aug 2016): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 05 (Jan 2017): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 06 (Feb 2018): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 07 (Feb 2020): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Avibase taxonomic concepts v. 08 (Feb 2021): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 00: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 01: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 02: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 03: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 04: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 05 (Jun 2012): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 05.1 (Oct 2012): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 06 (Nov 2013): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 06.1 (Feb 2014): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 07 (Jul 2014): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 08 (Oct 2015): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 09 (Dec 2016): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Birdlife checklist version 09.1 (Jun 2017): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v2 (Dec 2017): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v3 (Nov 2018): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v4 (Dec 2019): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v5 (Dec 2020): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v6 (Dec 2021): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v6b (Jul 2022): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v7 (Dec 2022): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
HBW and BirdLife Taxonomic Checklist v8 (Dec 2023): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Commission internationale pour les noms français des oiseaux (1993, révision 2009): Moucherolle côtier ( Empidonax difficilis) [version 1] |
Commission internationale pour les noms français des oiseaux (1993): Moucherolle côtier ( Empidonax difficilis) [version 1] |
Clements, version 2021: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2022: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 4th edition: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (as published): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2000 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2001 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2002 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2003 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2004 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 5th edition (incl. 2005 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (incl. 2007 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (incl. 2008 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (incl. 2009 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (version 6.5 incl. 2010 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (version 6.6 incl. 2011 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (version 6.7 incl. 2012 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (version 6.8 incl. 2013 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements 6th edition (version 6.9 incl. 2014 revisions): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2015: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2016: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2017: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2018: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Clements, version 2019: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 1.50: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 1.52: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 1.53: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 1.54: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 1.55: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2015: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2016: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2017: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2018: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2019: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2021: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2022: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
eBird version 2023: Western Flycatcher (Pacific-slope) ( Empidonax difficilis [difficilis Group]) [version 1] |
Howard and Moore 2nd edition (incl. ? suppl): Pacific Slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (as published): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 1.2): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 2.1): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 3.1): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 4): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 5): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 6): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 7): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 3rd edition (incl. corrigenda 8): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 4th edition (vol. 1-2): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Howard and Moore 4th edition (incl. corrigenda vol.1-2): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Handbook of the Birds of the World (vol 1-16): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Handbook of the Birds of the World Alive (31/01/2015): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Handbook of the Birds of the World Alive (03/07/2017): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Handbook of the Birds of the World and Birdlife (Dec 2017): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Handbook of the Birds of the World and Birdlife (Dec 2018): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 1.0: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 1.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 1.5: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 1.6: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 1.7: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.0: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.4: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.5: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.6: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.7: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.8: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.9: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.10: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 2.11: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 3.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 3.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 3.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 3.4: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 3.5: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 4.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 4.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 4.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 4.4: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 5.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 5.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 5.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 5.4: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 6.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 6.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 6.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 6.4: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 7.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 7.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 7.3: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 8.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 8.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 9.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 9.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 10.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 10.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 11.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 11.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 12.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 12.2: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
IOC World Bird Names, version 13.1: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Sibley and Monroe (1993): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Sibley and Monroe (1993, including corrections up to 1998): Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Sibley and Monroe, Birds of the World Version 2.0: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Working Group Avian Checklists, version 0.01: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Working Group Avian Checklists, version 0.02: Pacific-slope Flycatcher ( Empidonax difficilis) [version 1] |
Zoonomen - Zoological Nomenclature Resource: Empidonax difficilis [version 1] |
Zoonomen - Zoological Nomenclature Resource: Empidonax difficilis [version 1] |
Taxonomic status:
Species status: subspecies group (sometimes a species)
This taxon is a subspecies of
Empidonax difficilis
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Other synonyms
See also the taxonomic synonyms table.
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