These birds winter in immense numbers in the lower parts of Virginia, North and South Carolina, and Georgia, sometimes forming one congregated multitude of several hundred thousands. On one occasion Wilson met, on the banks of the Roanoke, on the 20th of January, one of these prodigious armies of Crow Blackbirds. They rose, he states, from the surrounding fields with a noise like thunder, and, descending on the length of the road before him, they covered it and the fences completely with black. When they again rose, and after a few evolutions descended on the skirts of the high timbered woods, they produced a most singular and striking effect. Whole trees, for a considerable extent, from the top to the lowest branches, seemed as if hung with mourning. Their notes and screaming, he adds, seemed all the while like the distant sounds of a great cataract, but in a more musical cadence. A writer in the American Naturalist (II. 326), residing in Newark, N. Y., notes the advent of a large number of these birds to his village. Two built their nest inside the spire of a church. Another pair took possession of a martin-house in the narrator’s garden, forcibly expelling the rightful owners. These same birds also attempted to plunder the newly constructed nests of the Robins of their materials. They were, however, successfully resisted, the Robins driving the Blackbirds away in all cases of contest. The Crow Blackbird nests in various situations, sometimes in low bushes, more frequently in trees, and at various heights. A pair, for several years, had their nest on the top of a high fir-tree, some sixty feet from the ground, standing a few feet from my front door. Though narrowly watched by unfriendly eyes, no one could detect them in any mischief. Not a spear of corn was molested, and their food was exclusively insects, for which they diligently searched, turning over chips, pieces of wood, and loose stones. Their nests are large, coarsely but strongly made of twigs and dry plants, interwoven with strong stems of grasses. When the Fish Hawks build in their neighborhood, Wilson states that it is a frequent occurrence for the Grakles to place their nests in the interstices of those of the former. Sometimes several pairs make use of the same Hawk’s nest at the same time, living in singular amity with its owner. Mr. Audubon speaks of finding these birds generally breeding in the hollows of trees. I have never met with their nests in these situations, but Mr. William Brewster says he has found them nesting in this manner in the northern part of Maine. Both, however, probably refer to the var. _æneus_.