Range. - Northern parts of the United States north to the Arctic regions.

Range. - From northern United States northward.

The chief difference between this species and the last is in the white on the back, either as a patch or in the form of broken bars. The nesting habits are just the same and the eggs cannot be distinguished from those of the preceding. Both forms are found breeding in the same localities in the Adirondacks and in nearly all other portions of their range.

Three-toed Woodpecker. Arctic Three-toed Woodpecker.

401a. Alaska Three-Toed Woodpecker. Picoides Americanus Fasciatus

Range. - Alaska, south to British Columbia and Washington.

Like the last, but with more white on the back. Eggs like the arcticus.

401b. Alpine Three-Toed Woodpecker. Picoides Americanus Dorsalis

Range. - Rocky Mountains from British Columbia south to New Mexico.

Slightly larger than the preceding and with more white on the back, almost entirely losing the barred effect of the American Three-toed variety. They nest chiefly in dead pines, laying four or five white eggs that cannot be distinguished from those of many other species. Size .95 x .70.