The Ground Robin is in many respects one of the most strongly characterized of our North American birds, exhibiting peculiarities in which all the members of this genus share to a very large degree. They frequent close and sheltered thickets, where they spend a large proportion of their time on the ground among the fallen leaves, scratching and searching for worms, larvæ, and insects. Though generally resident in retired localities, it is far from being a shy or timid bird. I have known it to show itself in a front yard, immediately under the windows of a dwelling and near the main street of the village, where for hours I witnessed its diligent labors in search of food. The spot was very shady, and unfrequented during the greater part of the day. It was not disturbed when the members of the family passed in or out. The call-note of this bird is very peculiar, and is variously interpreted in different localities. It has always appeared to me that the Georgian _jo-rēēt_ was at least as near to its real notes as _tow-hēē_. Its song consists of a few simple notes, which very few realize are those of this bird. In singing, the male is usually to be seen on the top of some low tree. These notes are uttered in a loud voice, and are not unmusical. Wilson says its song resembles that of the Yellow-Hammer of Europe, but is more varied and mellow. Nuttall speaks of its notes as simple, guttural, and monotonous, and of its voice as clear and sonorous. The song, which he speaks of as quaint and somewhat pensive, he describes as sounding like _t’sh’d-wĭtee-tĕ-tĕ-tĕ-tĕ-tĕ_. Wilson says this bird is known in Pennsylvania as the “Swamp Robin.” If so, this is a misnomer. In New England it has no predilection for low or moist ground; and I have never found it in such situations. Its favorite haunts are dry uplands, near the edges of woods, or high tracts covered with a low brushwood, selecting for nesting-places the outer skirts of a wood, especially one of a southern aspect. The nest is sunk in a depression in the ground, the upper edges being usually just level with the ground. It is largely composed of dry leaves and coarse stems as a base, within which is built a firmer nest of dry bents well arranged, usually with no other lining. It is generally partially concealed by leaves or a tuft of grass, and is not easily discovered unless the female is seen about it.