| Empidonax virescens|
The Acadian Flycatcher, Empidonax virescens is a species of flycatcher in Tyrannidae and Empidonax.
Green-crested flycatcher, green flycatcher, small pewee .
It has the largest wings and the longest and broadest bill of any empid .
Olive above, with yellow eye ring, two buffy or whitish wing bars; very long primary projection. Long, broad-based bill, with mostly yellowish lower mandible. Most birds show pale greyish throat, pale olive wash across upper breast, white lower breast, yellow belly and undertail coverts .
It moults before fall migration and fall birds have buffy wingbars .
Juvenile is brownish-olive above and edged with buff .
Main article: Differentiating the Empidonax flycatchers
It is easily confused with other empids, however, its voice can be used to differentiate between the species.
It is similar to the yellow-bellied flycatcher. However, the latter shows a more extensive olive wash across the breast and down the sides; lacks a pale area between the olive and the yellow belly; and has a more yellowish throat. .
It differs in plumage from other members by its brighter green upperparts and whiter underparts .
It flips its tail up .
Call is a soft peace, extended into song to an emphatic pee-tsup, accented on the first syllable. On breeding grounds, it also gives off a flicker like ti ti ti ti ti .
Monogamous. Nest is a sloppy cup nest made from sticks, grass, dried stems, bits of bark and cobwebs; nest is lined with grass, hair, and plant down and placed on a horizontal well away from the trunk . Female incubates for 13-15 days .
It is found in North Americana and migrates to Central and South Americana (winters in Costa Rica to Ecuador ).
- ^ BirdLife International (2008). Empidonax virescens. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 28 February 2011.
- ^ a b Terres, John K. (1980). The Audubon Society Encyclopedia of North American Birds. Alfred A. Knopf, Inc. ISBN 0394466519.
- ^ a b c France, Peter; et al. (2007). Bird: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 9780756631536.
- ^ a b c d e f Dunn, Jon L. and Alderfer, Jonathan (2006). National Geographic Guide to the Birds of North America. National Geographic Society. ISBN 1426200722.
- ^ Wetmore, A. 1936. The number of contour feathers in passeriform and related birds. Auk 53:159-169
- ^ a b c d Dick, Gary Owen (2002–2007). "Acadian Flycatcher Behavior". What Bird. Waite, Mitch. Retrieved February 28, 2011.
- ^ a b Peterson, Roger Tory and Peterson, Virginia Marie (1980). A Field Guide to the Birds East of the Rockies. Houghton Mifflin Company. ISBN 039526619X.
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