"Almost every spring there is a day or two of decided movement, when the species is very common and on occasion exceedingly abundant. On May 3, 1901, I witnessed a remarkable flight at Beaver. That morning the woods everywhere were full of Nashville warblers, to the exclusion of almost all other kinds. I counted a dozen in one tree. They kept mostly in the treetops and were singing very little." These warblers are also sometimes abundant in Ohio, for Milton B. Trautman (1940) noted as many as 80 individuals on May 15, 1932, at Buckeye Lake. _Nesting._--The nesting haunts of the eastern Nashville warbler are quite varied, and habitats similar to some of those frequented on the spring migration seem to be suitable for breeding grounds. But the nest is always placed on the ground and generally is well hidden. Gerald Thayer wrote to Dr. Chapman (1907): Birch Warbler would be a good name for this bird as it appears in the Monadnock region where it breeds abundantly. For here it is nowhere so common as in abandoned fields and mountain pastures half smothered by small gray birches. From the airy upper story of these low and often dense birch copses the Nashvilles sing; and among the club-mosses and ferns, and the hardhacks and other scrubby brushes at their bases and around their borders, the Nashvilles build their nests. But such is merely their most characteristic home. * * * Dark spruce woods they do not favor, nor big, mixed virgin timber; but even in these places, one is likely to find them wherever there is a little "oasis" of sunlight and smaller deciduous growth. They are fairly common among the scanty spruces, mountain ashes, and white birches of the rocky ridge of Mt. Monadnock, almost to the top--3,169 feet. F. H. Kennard records in his notes two nests found near Lancaster, N.H. One was among some dead weeds on a mossy hummock in a pasture; the other was in a swamp, at the base of and under a clump of alders beside a path. Miss Cordelia J. Stanwood (1910), of Ellsworth, Maine, writes: When a growth of evergreens--pine, fir, spruce and hemlock--is cut, it is succeeded by a growth of hard wood--gray, white and yellow birches, maple, poplar, beech, cherry and larch--and vice versa. As the woodland is cut in strips, there are always these growths in juxtaposition. Though the nest of the Nashville is always placed among the gray birches, the inevitable strip of evergreen woodland is near at hand, and a swale not far away.