One of the most interesting facts concerning this beautiful warbler is that, though not common, it is a winter sojourner, and therefore of perpetual interest to the student of birds. About the last of March, however, multitudes of them may be seen as they begin to move northward. By the middle of April all but a few stragglers have left us, and it is not till the last of September that they begin to return, the majority of them arriving about the middle of October. The habitat of the myrtle warbler includes the whole of North America, though it is chiefly found east of the Rocky Mountains, breeding from the northern United States northward into the Arctic regions; and, what is regarded as strange for so hardy a bird, has been found nesting in Jamaica. Its winter home is from about latitude 40° south into southern Central America. The adult female myrtle warbler is similar to the male, but much duller in color. In winter the plumage of the sexes is said to be essentially alike. The upper parts are strongly washed with umber brown, and lower parts more or less suffused with paler wash of the same. The young have no yellow anywhere, except sometimes on the rump. The whole plumage is thickly streaked above and below with dusky and grayish white. The places to study these attractive warblers are the open woods and borders of streams. In their northern winter homes, during the winter months, spiders, eggs and larvæ of insects constitute their principal food, though they also feed upon the berries of the poison ivy, and in the early spring, as they move northward, upon "insects that gather about the unfolding leaves, buds, and blossoms." Col. Goss says that in the spring of 1880 he found the birds in large numbers on Brier Island and other places in Nova Scotia, feeding along the beach, in company with the horned lark, upon the small flies and other insects that swarm about the kelp and debris washed upon the shore. "They utter almost continually, as they flit about, a _tweet_ note, the males often flying to the tops of the small hemlocks to give vent to their happiness in song, which is quite loud for warblers--rather short, but soft and pleasing."