A small, slight songbird with short, pointed bill, rather short, pointed wings (shorter primary projection than Hammond’s Flycatcher). Myiarchus tuberculifer The mournful whistle of the Dusky-capped Flycatcher is a common sound in woodlands almost throughout the American tropics. Spends winters south of the U.S.-Mexico border, and in southern Arizona and Texas. Dusky Flycatchers have longer tails and bills and shorter wings than the Hammond's. The Dusky Flycatcher is very similar in appearance to the Hammond's Flycatcher, with only a few subtle differences. The Dusky-capped Flycatcher is the smallest member of the grey and yellow-crested flycatchers seen in North America. Weak fluttering flight with shallow wing beats. The tail looks rather long (because of the short primary feathers). The legs and feet are black.

This flycatcher is seen in the southeast areas of Colorado and the southwest areas of New Mexico. The throat is whitish; as are outer tail feathers. This mostly greyish green coloured bird, seen with a light tint of yellow on its flanks and belly, is commonly seen near creeks and water.
The Dusky Flycatcher is one of many species in the genus Empidonax.These species are very similar in appearance and behavior, and they are notoriously difficult to differentiate.

The good news my husband made a sound recording of the little guy too - so I may be able to differentiate it by it's call. Bill is black except for orange base of lower mandible. This bird reaches its northern limits in Arizona and New Mexico, where it is common in summer in canyons and pine-oak forest. The upper breast has a pale olive wash. A small flycatcher: upperparts are grayish olive to grayish brown; underparts mostly whitish with a varying amount of yellow wash. In mountains and foothills of western North America, Dusky Flycatchers are unobtrusive little songbirds of open coniferous woodlands, aspen groves, chaparral, and scrubby or streamside thickets.
Males and females similar. The Dusky Flycatcher is very similar to the Least Flycatcher, which is also seen in the western regions of North America. Dusky Flycatcher: Breeds from British Columbia and western South Dakota south to southern California, central Arizona, and northern New Mexico. It is a native bird of Mexico that is seen in over half the country. American Dusky Flycatcher From The Crossley ID Guide Eastern Birds.jpg 1,391 × 1,800; 457 KB American Dusky Flycatcher.JPG 1,018 × 678; 258 KB Dusky Flycatcher (14101244632).jpg 800 … It is intermediate in size and shape between the Hammond's and Gray flycatchers; its breeding habitat is also intermediate, at middle elevations in the mountains, where tall conifers stand among shrubby low thickets. American dusky flycatcher. The American Dusky Flycatcher, or simply Dusky Flycatcher, (Empidonax oberholseri) is a small, insectivorous passerine of the tyrant flycatcher family.. Empidonax oberholseri Among the confusing Empidonax flycatchers in the west, birders know the Dusky as a bird in the middle. White eye ring, and wing bars conspicuous. Like other Empidonax flycatchers, the Dusky usually has two white wing-bars, a white eye-ring, olive upperparts, and yellowish-cream underparts. The bill is mostly dusky, but adults have pale orange at the base of the lower mandible. I'm having a bit of trouble with this little somewhat nondescript bird.. I think it may be a Pacific slope flycatcher, but there are several species that overlap and look very similar. Dusky Flycatcher: Small flycatcher with olive-gray upperparts and white or yellow tinged underparts. The American Dusky Flycatcher, or simply Dusky Flycatcher, (Empidonax oberholseri) is a small, insectivorous passerine of the tyrant flycatcher family. Eye has faint eye-ring. Source: Wikipedia ( 0 votes)