Dolichonyx oryzivorus, Swainson.
BOBOLINK; REEDBIRD; RICEBIRD.
Emberiza oryzivora, Linn. Syst. Nat. I, 1766, 311.—Gm. I, 1788, 850.—Wilson, Am. Orn. II, 1810, 48, pl. xii, f. 1, 2. Passerina oryzivora, Vieillot, Nouv. Dict. XXV, 1817, 3. Dolichonyx oryzivora, Swainson, Zoöl. Jour. III, 1827, 351.—Ib. F. Bor.-Am. II, 1831, 278.—Bon. List, 1838.—Ib. Conspectus, 1850, 437.—Aud. Syn. 1839, 139.—Ib. Birds Am. IV, 1842, 10, pl. ccxi.—Gosse, Birds Jam. 1847, 229.—Baird, Birds N. Am. 1858, 522.—Max. Cab. J. VI, 1858, 266.—Cooper, Orn. Cal. I, 1870, 255.—Samuels, 335. Icterus agripennis, Bonap. Obs. Wils. 1824, No. 87. Aud. Orn. Biog. I, 1831, 283; V, 1839, 486, pl. liv.—Nutt. Man. I, 1832, 185. Icterus (Emberizoides) agripennis, Bon. Syn. 1828, 53. Dolichonyx agripennis, Rich. List, 1837. Psarocolius caudacutus, Wagler, Syst. Av. 1827, 32.
Dolichonyx oryzivorus.
Sp. Char. General color of male in spring, black; the nape brownish cream-color; a patch on the side of the breast, the scapulars, and rump, white, shading into light ash on the upper tail-coverts and the back below the interscapular region. The outer primaries sharply margined with yellowish-white; the tertials less abruptly; the tail-feathers margined at the tips with pale brownish-ash. In autumn totally different, resembling the female.
Female, yellowish beneath; two stripes on the top of the head, and the upper parts throughout, except the back of the neck and rump, and including all the wing-feathers generally, dark brown, all edged with brownish-yellow, which becomes whiter near the tips of the quills. The sides sparsely streaked with dark brown, and a similar stripe behind the eye. There is a superciliary and a median band of yellow on the head. Length of male, 7.70; wing, 3.83; tail, 3.15.
Hab. Eastern United States to the high Central Plains. North to Selkirk Settlement, and Ottawa, Canada; and west to Salt Lake Valley, Utah, and Ruby Valley, Nevada (Ridgway); Cuba, winter (Caban.); Bahamas (Bryant); Jamaica (Gosse, Scl., Oct.; March, Oct., and in spring); James Island, Galapagos, Oct. (Gould); Sombrero, W. I. (Lawrence); Brazil (Pelzeln); Yucatan.
A female bird from Paraguay (Dec., 1859) is undistinguishable from the average of northern ones, except by the smaller size. Specimens from the western plains differ from those taken near the Atlantic Coast in having the light areas above paler, and less obscured by the grayish wash so prevalent in the latter; the ochraceous of the nape being very pale, and at the same time pure.
Habits. The well-known and familiar Bobolink of North America has, at different seasons of the year, a remarkably extended distribution. In its migrations it traverses all of the United States east of the high central plains to the Atlantic as far to the north as the 54th parallel, which is believed to be its most northern limit, and which it reaches in June. In the winter it reaches, in its wandering, the West Indies, Central America, the northern and even the central portions of South America. Von Pelzeln obtained Brazilian specimens from Matogrosso and Rio Madeira in November, and from Marabitanas, April 4th and 13th. Those procured in April were in their summer or breeding plumage, suggesting the possibility of their breeding in the high grounds of South America. Sclater received specimens from Santa Marta and from Bolivia. Other specimens have been reported as coming from Rio Negro, Rio Napo, in Brazil, Cuba, Jamaica, Porto Rico, Paraguay, Buenos Ayres, etc.