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Mexican species
| Willow Flycatcher (Empidonax traillii) | |||
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| Subspecies | Hide subspecies | ||
| traillii | traillii (Eastern) | Breeds Great Plains to northeastern USA and southeastern Canada; winters to northwestern South America. | |
| brewsteri | brewsteri/adastus (Northwestern) | Breeds Pacific Northwest (southern British Columbia) to mountains of central California; probably winters mainly western Mexico southward to Panama. | |
| adastus | brewsteri/adastus (Northwestern) | Breeds Great Basin and central Rocky Mountains southward to Utah and Colorado; winters mainly western Mexico southward to Costa Rica. | |
| extimus | extimus (Southwestern) | Breeds s Calif. e to New Mexico and (?) formerly w Texas | |
| Endemic status | |||
| Sound Guide | |||
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