Western Bird Guide: Birds of the Rockies and West to the Pacific

by Charles K. Reed

OLIVE-SIDED FLYCATCHER.

459. Nuttallornis borealis. 7½ inches.

These are nowhere abundant, and in some parts of the country, especially in the central portions, they are very rare. In the western range, they may be found from Alaska to southern California; for breeding places they seem to prefer swampy land, covered with many dead coniferous trees, mixed in with the green trees; their nests are placed well up in the trees and are made of twigs, loosely put together, and lined with small roots and moss. The three or four creamy white eggs are spotted with brown and lilac, forming about the larger end (.85 × .65).