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Breeding Range. (Fig. 138). Fairly common in the badlands along the lower portion of the Little Missouri River (within Dunn and McKenzie Counties and including the Killdeer Mountains); uncommon in the badlands along the upper portion of the Little Missouri River (within Billings, Golden Valley, and Slope Counties), along the wooded valley of the Missouri River below Garrison Dam (extending downstream to a point about 10 miles below Bismarck), in the Pembina Hills (within Cavalier, Pembina, and Walsh Counties), in the deltaic sand area of western Pembina County, in the wooded hills and lake shores of the Devils Lake area (eastern Benson County), and in the wooded valley along the Sheyenne River (within southern Barnes County and northwestern Ransom County); uncommon and local elsewhere along the Sheyenne River valley, along other tributaries of the Red River, in the Turtle Mountains, along the Mouse and Des Lacs rivers, and along the Missouri River and larger tributaries above the mouth of the Little Missouri River.

Breeding Habitat. Characteristic of semiopen stands of upland forest, that are composed of immature or second-growth trees. These forest types include mixed stands of Rocky Mountain cedar and green ash in the badlands along the Little Missouri River, and mixed stands of green ash, American elm, box elder, and other deciduous trees along the Missouri River and in the northern and eastern portions of the state.

Nesting. Adults with young were reported near Killdeer in Dunn County in July by Perna M. Stine (1942, correspondence with S. O. Kolstoe). Young birds also were observed near Pembina during the period, July 21-August 2, 1887 (V. Bailey).

Figure 138. Breeding Range of Black-and-white Warbler.