The bird-lover has many red-letter days in his calendar, particularly when the birds are moving northward. The earliest arrivals, while snow still covers the ground, give their own peculiar thrill of delight, and waken in him new energy and great anticipations for the coming season of bird study. But these early arrivals soon become a part of the landscape and cease to lend any peculiar delight. Not so with the host of warblers, for they are here one day and may be up and away the next, not to be seen again for two or three months or even a year. One must be on the alert during warbler time if he expects to catch a glimpse of the passing host. But there are distinctively "warbler days" during this warbler time. These vary in different years with the weather and the advance of vegetation, from late April to the second or even third week of May, in northern Ohio and central Iowa, and proportionately later or earlier north or south of that latitude. The subject of our sketch is not among the early migrating warblers nor yet among the later ones. He usually travels with the second large flight, and may then be expected late in April or early in May. The earliest Oberlin, Ohio, record falls on April 27, 1896, and the latest on May 10, 1897. Whether the birds arrive early or late they usually remain in the vicinity two weeks, the males being present during the first week and the females during the second. I have never found the two sexes present on the same date. The species cannot be said to be common even during the height of the spring migration, nor yet are they rare. Few are seen during the fall migration at Oberlin, and they during the last week of September and the first week of October. Further west in the Mississippi valley the fall migrants seem greatly to outnumber those of spring.