The nest of this species, whether it be placed in the hole of a Woodpecker or Squirrel, or in a place dug by itself, is seldom found at a height exceeding ten feet. Most of those which I have seen were in low broken or hollowed stumps only a few feet high. The materials of which it is composed vary in different districts, but are generally the hair of quadrupeds, in a considerable quantity, and disposed in the shape of a loose bag or purse, as in most other species which do not hang their nests outside. Some persons have said that they lay their eggs on the bare wood, or on the chips left by Woodpeckers; but this is not the case, in so far as I have examined them; and in this my observations are confirmed by those of Dr BREWER of Boston and Mr M’CULLOCH of Pictou, who also have inspected nests of this species. The eggs rarely exceed eight in number; they measure five-eighths of an inch in length, by three-eighths and three-quarters, are rather pointed at the smaller end, white, slightly sprinkled with minute dots and markings of light reddish. Those of the first brood are deposited from the middle of April to that of May; for the second about two months later. The parents I have thought generally move along with the young of the second brood. Dr BREWER says, “on the 20th of June, I found in a single Titmouse’s hole a mass of the hair of the Common Skunk and moss large enough to weigh two or more ounces, and sufficient to construct a nest for some of our larger birds, such for instance as Wilson’s Thrush.” Mr M’CULLOCH found a nest of this bird placed about two feet from the ground in a small stump, which seemed to have been excavated by the birds themselves. It contained six young, and was lined entirely with the hair which cattle, in rubbing themselves, had left upon the stump. The flight of this species, like that of all our American Titmice, is short, fluttering, generally only from tree to tree, and is accompanied with a murmuring sound produced by the concavity of the wings. It is seldom seen on the ground, unless when it has followed a fruit that has fallen, or when searching for materials for its nest. It usually roosts in its nest during winter, and in summer amid the close foliage of firs or evergreens. In winter, indeed, as well as often in autumn, it is seen near the farm-houses, and even in villages and towns, busily seeking for food among the trees.