Range. - Western United States from the Rockies to the Pacific, breeding north to British Columbia; winters in Mexico and Central America.
Similar to the last but with white spots on the upper and lower eyelids, black lores, and the black patch on the breast mixed with gray. These ground inhabiting birds are found in tangled thickets and shrubbery where they nest at low elevations, from one to five feet from the ground. Their nests are made of grasses and shreds of bark, lined with hair and finer grasses, and the eggs are white, specked, spotted and blotched with shades of brown and neutral tints; size .72 x .52. Data. - Sonoma, Cal., May 17, 1897. A small nest, loosely made of grasses (wild oats) lined with finer grasses; placed in blackberry vines 14 inches from the ground in a slough in the valley.
Mourning Warblers. Macgillivray Warblers.