. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . continuously white . . dorsalis, p. Median line of back not continuously white. 3. Median line of back black and white, black prevailing. americanus, p. ;. Median line of Ijack usually black and white, white prevailing. fasciatus, p. 209. 400. Picoides arcticus (Swains.).Arctic Three-toed Wood- Adult male. — Upper parts glossy blueblack except for squarish yellow crownpatch, fine white spotting on wings, andplain wliite outer tail feathe
. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . continuously white . . dorsalis, p. Median line of back not continuously white. 3. Median line of back black and white, black prevailing. americanus, p. ;. Median line of Ijack usually black and white, white prevailing. fasciatus, p. 209. 400. Picoides arcticus (Swains.).Arctic Three-toed Wood- Adult male. — Upper parts glossy blueblack except for squarish yellow crownpatch, fine white spotting on wings, andplain wliite outer tail feathers; sides ofhead black and white; under parts white,lieavily barred with black on sides. Adultfemale: similar, but without yellow onhead. Young male: like adult, but yel-low crown patch more restricted, blackof upper parts duller, under parts tingedwith brown. Young female: crown black,sometimes with trace of yellow. , wing , tail , Distribution. —Northern North Amer-ica from the arctic regions to the north-ern United States (New England, NewYork, Michigan, Wisconsin, Minnesota,. Fioia Biolo-ical Survey, U. ofAgriculture. Fig. 274. Montana^ Idaho, California, and Nevada.) 1 Picoides arcticus tpmiirostrir, slender-billed form of P. arcticus. Distribtition. — Cascades and Sierra Nevada in California, south to Lake , xvii. 131.) {The WOODPECKERS 209 Nest. — Usually in dead trees or stumps rarely above 8 feet from theground. Eggs : generally 4, white. Food. — Almost wholly wood-boring insects and larvse. The arctic three-toec woodpecker is essentially a bird of thepine, spruce, fir, and tamarack forests, and is rarely seen in otherlocalities. It is generally a resident, rarely migrating to any . Like the hairy woodpecker, they are persistent drummers, rat-tling away for minutes at a time on some dead limb, and are espe-cially active during the mating season in April. I have located morethan o
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