In 1905, O. W. Howard discovered the DUSKY WARBLERS at home in the steep and rugged canyons of San Clemente Island. One nest he found well concealed in the outer branches of a small shrub eight feet above the ground: another, in one of the tallest trees, was fully thirty feet high. They were very loosely constructed affairs of dead leaves with the nest proper in the center, snugly lined with hair of wild goats.
The Dusky's habitat is limited and according to Grinnell, large numbers appear around Pasadena during August, gradually diminishing thru the winter. They probably leave the naboring islands during the dry spell.
Their song and habits are similar to those of the Lutescent Warbler.
Santa Barbara Islands, California and adjoining mainland.