Range. - Western North America, from the Mississippi Valley to the Pacific; winters south of the United States.

This species is very similar to the next, but the back is said to be more brownish. They are common and nest abundantly in thickets and low scrubby woods, usually placing the nest at a low elevation, preferably in a clump of willows; the nests are made of fine strips of bark, plant fibres, and very fine rootlets being woven about and firmly fastened in upright crotches. Their eggs, which are laid in June, are buffy white, specked and spotted, chiefly at the large end, with brownish; size .70 x .54.

Creamy white

Creamy white.

466 Traill s Flycatcher Empidonax Trailli Trailli 915466 Traill s Flycatcher Empidonax Trailli Trailli 916466 Traill s Flycatcher Empidonax Trailli Trailli 912

464 - 466

466a. Alder Flycatcher. Empidonax Trailli Alnorum

Range. - United States, east of the Mississippi and north to New Brunswick.

The only difference between this and the preceding variety is in the more greenish upper parts. They are quite abundant in the breeding season from New England and northern New York northward, frequenting, to a great extent, alder thickets bordering streams. Their nests and eggs do not differ appreciably from those of the western variety of Traill Flycatcher.