_Eggs._--The Baird sandpiper lays ordinarily four eggs, occasionally only three. These vary in shape from ovate or ovate pyriform to subovate, and they have a slight gloss. In color they often resemble certain types of western sandpipers' eggs, as they are usually of a decidedly reddish tone; but they are considerably larger. The ground color varies from "pinkish buff" to "pale pinkish buff" or from "olive buff" to "cartridge buff." Three quite different types are represented in my collection. In the western sandpiper type the "pinkish buff" ground color is quite evenly covered over the whole egg with small, elongated spots, somewhat thicker at the larger end and having a spiral tendency, of "Hay's russet" and "chestnut brown," with a few underlying spots of "brownish drab." Another set has a "cartridge buff" ground color, which is unevenly covered, chiefly at the larger end, with small spots of duller browns, "bister," "Saccardo's umber," and light shades of "brownish drab." This seems to be the commonest type. An unusually beautiful set has a "pinkish buff" ground color, sparingly sprinkled with minute brown dots and boldly blotched with great, irregular splashes of deep, rich browns, "chestnut," "chocolate," and "liver brown," overlying large splashes of various shades of "vinaceous gray." The measurements of 54 eggs average 33.1 by 23.8 millimeters; the eggs showing the four extremes measure =33.5= by 24.4, 34.3 by =24.6= and =30= by =22= millimeters. _Young._--Incubation is shared by both sexes, but we have no data as to its duration. Mr. Dixon (1917) found the male bird covering the eggs more often than the female, and others have reported finding the male caring for the young. Mr. Dixon (1917) says of the young: The young sandpipers were found feeding in the shallower pools, where the water was less than 1 inch deep. At times as many as five were noted in an area 1 yard square. They congregated along the water's edge, picking up, as the tide slowly receded, many bits of food. The nature of this provender I could not make out, although the young birds would often come within 20 feet of me when I remained motionless for a few minutes. The old birds were much more shy, often taking flight or retreating to distant gravel bars upon my approach. Considerable time was spent by both young and old in making short flights about the harbor. These flights alternated with periods of food getting, and were seemingly in preparation for the fall migration. It was only a few days then until the bulk of the species left on their southward journey.