The little birds of the group to which this species belongs, of which there are several, are all of humble and unpretending appearance, and live in the vicinity of the shores of the ocean and the margins of streams of fresh water, and hence have been designated Swamp Sparrows. The _flats_, or other low and level tracts, overgrown with reedy or sedgy vegetation, in the vicinity of the sea-shore, are the favorite resorts of two or three species throughout a large portion of the entire extent of the Atlantic coast of the United States; while somewhat similar localities along rivers or smaller streams, or even swamps and marshes in the interior, afford appropriate habitations for others. In these they subsist mainly on seeds of grasses and such other plants as usually abound in those situations, and occasionally on insects. The Swamp Sparrow, first described by the celebrated ornithologist, Wilson (_Ammodromus palustris_), is the best known of these birds, and is abundant in all suitable localities, during the summer season, throughout the greater part of the older States of the Union. In winter, it migrates southward, and is found in large numbers along the Mississippi river in the south, and other streams in the southern States. The Swamp Sparrows have no song, other than a few rather remarkable and not unmusical notes. Dr. Heermann remarks of this bird: “In the fall of 1851, I met with a single specimen of this bird, in company with a flock of Sparrows of various kinds. In the spring of 1852, I found it quite abundant on the Calaveras river, where I procured several specimens. Its flight appeared feeble, and when raised from the ground, from which it would not start until almost trodden upon, it would fly a short distance, and immediately drop again into the grass. Its notes are a ditty, resembling that of our Chipping Sparrow (_E. socialis_), and were heard towards the spring season.” In our plate this bird is represented of the size of life. The plant is a western species of _Ipomea_, which was raised from the seed by our esteemed friend, Mr. Robert Kilvington, of Philadelphia, to whose kindness we are indebted for the privilege of figuring it and other plants for the plates of the present work. DESCRIPTION AND TECHNICAL OBSERVATIONS. Genus Ammodromus. Swainson, Zoological Journal, III. p. 348. (1827.) Size small; bill lengthened, pointed; tip of upper mandible slightly curved downwards; wings very short; the first primary shorter than the succeeding four or five, which are nearly equal; tail moderate, or rather long, with its feathers narrow; tarsi and toes rather long, slender. An American genus, containing six or seven species. Ammodromus ruficeps. Cassin, Proc. Acad., Philada., VI. p. 184. (Oct., 1852.) Form. Bill shorter than usual in this genus; wings short, rounded; tail long; tarsi lengthened, slender. Dimensions. Total length of skin, about 5¾ inches; wing, 2½; tail, 2¾ inches.