fascination which attends their study.

After May 15 there is an evident thinning in the ranks of the migrating army, and by June 1 we shall see only a few stragglers. The Transient Visitors will have gone to their more northern homes and our bird population will then consist only of the ever present Permanent Residents and the Summer Residents which the great northward march of the birds has brought us from the South.

Although June may be called the Month of Nests, nest-building begins long before the migration ends. Some Owls and Hawks lay in March, and the Bluebird, White-breasted Nuthatch and Robin have eggs by April 20, while most of our birds go to housekeeping during the latter half of May. Nevertheless, it is in June that their domestic life is at its height; and to the student of birds' habits this is by far the most interesting month in the year.

TREE SWALLOWS . . . RESTING IN ROWS ON WAYSIDE WIRES

Birds that raise two or even three broods will still be occupied with household affairs in July, but one-brooded birds, having launched their families, will seek retirement to undergo the trying ordeal of molt, whereby they will get a complete new costume. Often this will be quite unlike the one in which they arrived from the South—as the student will discover, sometimes to his confusion! In August, the Month of Molt, the seclusion sought by many of our summer birds induces the belief that they have left us, but toward the latter part of the month they reappear. The first week in August virtually marks the end of the song season. The Wood Pewee and Red-eyed Vireo remain in voice throughout the month, but the great chorus which has made May, June and most of July vocal, we shall not hear before another spring—so short is the time when we are blessed by the songs of birds.

Meanwhile the feathered army has begun its retreat to winter quarters. As early as July 15, Tree Swallows will arrive and by the end of the month will be seen resting in rows on wayside telegraph wires, or en route to their roosts in the marshes. In the now heavily leaved forests the returning Warblers and Flycatchers will not be so easily observed as they were in May, but in September they become too abundant to be overlooked. The southward movement grows in strength until late September, when the greater part of the insect-eating birds have left us, and it is terminated by the frosts, and consequent falling leaves, of October.

But just as in the spring some of the northbound migrants drop from the ranks to spend the summer with us, so in the fall some of the southbound travelers will remain with us for the winter. The Junco, which we are wont to think of as only a winter bird, arrives the latter part of September to remain until April, and with him come the Golden-crowned Kinglet, Brown Creeper and Winter Wren—all to stay until spring. October will bring the Horned Lark, Pine Finch, Snow Bunting, Tree Sparrow and Northern Shrike and these birds with the ones just mentioned, and the ever faithful Permanent Residents, give us a goodly winter company.

But the possibilities do not end here; there may be Redpolls, American and also White-winged Crossbills, perhaps Pine Grosbeaks, and, best of all, Evening Grosbeaks, who of recent years have been coming to us more or less regularly from no man knows where.

So from one year's end to the other, there is not a month, a week or day which has not interests of its own. The bird student may pass his life in one place, but he can never say "I have finished" for the morrow may bring some new bird or new fact. How immeasurably this association with the birds adds to the joy of life! What new meanings their comings and goings give to the changing seasons; the very air is made eloquent by their calls and songs. Why should we not all "come at these enchantments"?

IN OCTOBER, WHEN MIGRATING HAWKS DOT THE SKY, THE GREAT SOUTHWARD MARCH OF THE BIRDS IS NEARING ITS END.