_Eggs._--The hairy woodpecker lays three to six eggs, but four seems to be the commonest number. The eggs vary in shape from oval to elliptical-oval, usually more nearly oval. The shell is smooth and often quite glossy. The color is pure white, but in fresh eggs the yolk shows through the translucent shell, giving the egg a beautiful orange-pink color. The measurements of 47 eggs average 23.81 by 18.04 millimeters; the eggs showing the four extremes measure =29.50= by 18.80, 28.70 by =18.90=, and =20.57= by =16.26= millimeters. _Young._--Only one brood is raised in a season, but, if the nest is robbed, the female will lay a second set after an interval of 12 or 14 days, and sometimes even a third set; often subsequent layings may be in the same nest hole. Bendire (1895) says: The duties of incubation are divided between the sexes and last about two weeks. The young when first hatched are repulsive-looking creatures, blind and naked, with enormously large heads, and ugly protuberances at the base of the bill, resembling a reptile more than a bird. They are totally helpless for some days, and can not stand; but they soon learn to climb. They are fed by the parents by regurgitation of their food, which is the usual way in which the young of most Woodpeckers are fed when first hatched. * * * The young remain in the nest about three weeks. When disturbed they utter a low, purring noise, which reminds me somewhat of that made by bees when swarming, and when a little older they utter a soft “puirr, puirr.” Even after leaving the nest they are assiduously cared for by both parents for several weeks, until able to provide for themselves.