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Scientific Name
Empidonax difficilis occidentalis
Scientific Name w/ Auth.
Empidonax difficilis occidentalis Nelson, 1897
Park
Fossil Butte National Monument (FOBU)
Sensitive
No
Park Accepted
Accepted
Record Status
Approved
Park Preferred Common Names
Western Cordilleran Flycatcher, Cordilleran Flycatcher
Park Synonyms
Empidonax occidentalis
Taxonomic Hierarchy
| Kingdom | Animalia |
| Subkingdom | Bilateria |
| Infrakingdom | Deuterostomia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Infraphylum | Gnathostomata |
| Superclass | Tetrapoda |
| Class | Aves |
| Order | Passeriformes |
| Family | Tyrannidae |
| Genus | Empidonax |
| Species | Empidonax difficilis |
| Subspecies | Empidonax difficilis occidentalis |
Occurrence
Present
Occurrence Notes
Species was detected and positively identified during the 2001-2002 avian inventory and is documented in that report (Johnson et al., 2003).; Data Source: Johnson et al. 2003, Bibkey #549677
Nativeness
Native
Nativeness Notes
Data Source: Johnson et al. 2003, Bibkey #549677
Abundance
Common
Abundance Notes
Data Source: Johnson et al. 2003, Bibkey #549677
Seasonality Tags
-
Resident
Probable Breeder - Indirect form of evidence: Multiple singing males found in suitable breeding habitat during their breeding season.; Data Source: Johnson et al. 2003, Bibkey #549677
Threatened Endangered Status
State Species of Concern statuses
Ozone Sensitive Status
NatureServe GRank
NatureServe SRank
Observations
0
References
Vouchers
0
External Links
0
Evidence counts shown include evidence for related synonyms.
Created By
M. Beer, NCPN I&M
Created Date
4/8/2002 12:00:00 AM
Last Modified By
jrbrehm@nps.gov
Last Modified Date
9/20/2025 12:02:15 PM
Notes
Park Species Detail: per Johnson et al. 2003, "Western Flycatcher has been split into two species; FOBU record is Cordilleran Flycatcher (not Pacific Slope Flycatcher). Species changed from E. difficilis to E. occidentalis.", Park Species Data Source: Johnson and Barr 2000.
Other Parks
Arches National Park (ARCH)
Black Canyon of the Gunnison National Park (BLCA)
Bryce Canyon National Park (BRCA)
Canyonlands National Park (CANY)
Capitol Reef National Park (CARE)
Cedar Breaks National Monument (CEBR)
Colorado National Monument (COLM)
Curecanti National Recreation Area (CURE)
Dinosaur National Monument (DINO)
Hovenweep National Monument (HOVE)
Natural Bridges National Monument (NABR)
Pipe Spring National Monument (PISP)
Timpanogos Cave National Monument (TICA)
Zion National Park (ZION)
Black Canyon of the Gunnison National Park (BLCA)
Bryce Canyon National Park (BRCA)
Canyonlands National Park (CANY)
Capitol Reef National Park (CARE)
Cedar Breaks National Monument (CEBR)
Colorado National Monument (COLM)
Curecanti National Recreation Area (CURE)
Dinosaur National Monument (DINO)
Hovenweep National Monument (HOVE)
Natural Bridges National Monument (NABR)
Pipe Spring National Monument (PISP)
Timpanogos Cave National Monument (TICA)
Zion National Park (ZION)
