Summary ⁷

The American Dusky Flycatcher, or simply Dusky Flycatcher, (Empidonax oberholseri) is a small, insectivorous passerine of the tyrant flycatcher family.

Distribution ⁸

occurs (regularly, as a native taxon) in multiple nations

Habitat and ecology ⁹

Systems

• Terrestrial

Migration ¹⁰

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.

A complete migrant, traveling regularly through the southwestern United States, casually through coastal Washington and Oregon, to Baja California, and east to central and south Texas (AOU 1983). Fall migration begins early to mid-August and most individuals are no longer on territory by late August (Sedgwick 1993b), but as early as 7 August (Sedgwick 1975). Fall migrants reported in Sonora as early as 6 August. In spring, males generally arrive more than one week before females, typically in the second week of May (Sierra Nevada, w. Montana; Johnson 1963, Sedgwick 1975).

Sources and Credits

1. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/7457894@N04/2903491830
2. (c) Manuel Grosselet, some rights reserved (CC BY-NC), uploaded by Manuel Grosselet
3. (c) Juan Carlos Pérez Magaña, some rights reserved (CC BY-NC), uploaded by Juan Carlos Pérez Magaña
4. (c) BJ Stacey, some rights reserved (CC BY-NC), http://farm6.staticflickr.com/5337/9013551684_3b111f78c6_o.jpg
5. (c) BJ Stacey, some rights reserved (CC BY-NC), http://farm4.staticflickr.com/3729/9013551382_701e4db003_o.jpg
6. (c) BJ Stacey, some rights reserved (CC BY-NC), http://farm8.staticflickr.com/7306/9012367319_928f8df59c_o.jpg
7. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Empidonax_oberholseri
8. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/28824850
9. (c) International Union for Conservation of Nature and Natural Resources, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/31041344
10. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/28824855

More Info

• iNat taxon page
• Animal Diversity Web
• Biodiversity Heritage Library
• BOLD Systems BIN search
• CalPhotos
• Global Biodiversity Information Facility (GBIF)
• NatureServe Explorer 2.0
• VertNet
• Xeno-canto

Range Map

(c) Discover Life and original sources, some rights reserved (CC-BY-NC-SA)

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