AMERICAN BITTERN, ARDEA MINOR, _Wils._ Amer. Ornith. vol. vii. p. 35, pl. 65, fig. 3. ARDEA MINOR, _Ch. Bonaparte_, Synopsis of Birds of United States, p. 307. AMERICAN BITTERN, _Nuttall_, Manual, vol. ii. p. 60. AMERICAN BITTERN, ARDEA LENTIGINOSA, _Richards. and Swains._ Fauna Bor.-Amer. vol. ii. p. 374. Adult Male. Plate CCCXXXVII. Fig. 1. Bill longer than the head, moderately stout, straight, compressed, tapering to the point. Upper mandible with its dorsal line straight, towards the end slightly convex and declinate, the ridge broad and rather rounded at the base, gradually narrowed to the middle, then a little enlarged, and again narrowed to the point, the sides bulging, towards the margin erect, the edges sharp, towards the end obscurely serrated, the tip narrow, with a distinct notch or sinus on each side. Nasal groove oblong, with a long depressed line in front; nostrils sub-basal, linear, longitudinal. Lower mandible with the angle very long and extremely narrow, the dorsal line ascending and slightly convex, the sides flattened and sloping outwards, the edges sharp, direct, obscurely serrulate, the tip extremely slender. Head small, oblong, much compressed. Neck long. Body slender, much compressed. Legs longish, stout; tibia bare for about an inch, reticulated all round, the scales on the hind part larger; tarsus roundish, with numerous large scutella before, reticulated behind with angular scales; toes very long, slender, marginate, the fourth and third connected by a short web, not reaching the second joint of the former; first toe large, second longer than fourth, all covered with numerous large scutella above; claws long, slender, tapering, slightly arched, that of hind toe much larger and more arched. Eyelids, and a large space before the eye, bare. Plumage loose, soft, and blended; hind part of neck in its whole length, and a large space on the fore part of the breast without feathers, but covered, those on the neck being directed obliquely backwards. Wings rather short, broad, convex; primaries broad, rounded, the first pointed, shorter than the third, which is slightly exceeded by the second, the rest slowly graduated; secondaries very broad, rounded, the inner elongated so as slightly to exceed the primaries when the wing is closed. Tail very short, rounded, of _ten_ feathers.