In the juvenal plumage the center of the crown is blackish brown, with "ochraceous tawny" edgings; the rest of the crown and nape are "deep mouse gray"; the feathers of the back are brownish black, broadly edged with "tawny" or "ochraceous tawny"; the scapulars and all the wing coverts are deep sepia, broadly edged with colors varying from "tawny" to buffy white, whitest on the coverts; the under parts are white, with a broad band of pale buff across the throat and breast; the flanks are somewhat tinged with the same color; the throat, breast, and flanks are more or less heavily marked with median dusky streaks. This plumage is worn through July and part, or all, of August. The postjuvenal molt of the body plumage begins in some birds about the 1st of August, but in others not until two or three weeks later. This produces a first winter plumage similar to that of the adult, but distinguishable by the faded juvenal wing coverts and a few retained scapulars and tertials. The partial prenuptial molt of both young birds and adults comes rather late in the spring, April and May, and involves the body plumage and some of the wing coverts and scapulars. Adults also have a complete postnuptial molt, beginning in August and lasting until October. The winter plumage is similar to that of the purple sandpiper, but it is conspicuously marked on the breast and flanks with large triangular or circular spots of dusky, whereas the purple sandpiper usually has a plain gray breast in winter. _Food._--Very little seems to be known about the food of the Aleutian sandpiper, but probably its diet is very similar to that of the purple sandpiper, which has similar feeding habits. Both species are fond of frequenting rocky shores and stony beaches, where they seem to be gleaning food. Doctor Stejneger (1885) has seen them "at low water eagerly picking up Gammarids among the stones close to the breakers." Bernard J. Bretherton (1896) writes: Large flocks of these birds were seen during February, 1893, but were not met with during other winters. They were met with on a low sand bar, after a protracted storm which had thrown up millions of sand fleas, upon which they were feeding so industriously as to be easily approached and to which feast they returned several times, even after their ranks had been thinned by raking charges of fine shot.