SYLVICOLIDJE — SYLVICOLIN^ : TRUE WARBLERS. 
309 
to which its luxurious nuptial song entitles it not less than the Louisiana water thrush itself. 
The bird spends much of its time on the ground, trailing prettily among the fallen leaves with 
mincing steps. Nest on the ground, of leaves, grasses, etc. ; eggs 4-6, white or slightly 
creamy, profusely speckled with reddish-brown and lilac, 0.85 X 0.65. 
136. S. nae'vius. (Lat. ncsvius, spotted; ncevus, a mole, birth-mark.) Wag-tail Warbler. 
Aquatic Accentor. New York Water Thrush. ^ 9 : Uniform dark olive-brown ; 
wings and tail similar, unmarked ; below, pale sulphury- yellow, everywhere, except perhaps on 
the middle of the belly, thickly speckled or streaked with dark olive-brown, the markings small- 
est on the throat, largest on the sides. A long dull whitish superciliary line. Bill and feet dark. 
Length 5.50-6.00; extent 8.50-9.50; wing 2.75-3.00; tail 2.25; bill not over 0.50 along 
the culmen. The sexes do not differ appreciably. The shade of the ui)per parts varies from a 
decidedly olivaceous-brbwn to a purer, darker bistre-brown, and that of the under parts from 
sulphur-yellow to nearly white ; but it is never of the buffy-white of S. motacilla. The streak- 
ing varies in amount and intensity, but has a sharp distinct character in comparison with S. 
motacilla, and is rarely if ever absent from the throat. No bill over 0.50, and this member lacks 
the peculiar shape, as well as size, characteristic of S. motacilla. The very young bird sooty- 
blackish, each feather of the upper parts with terminal bar of ochraceous ; wing-coverts tipped 
with the same, forming two bars ; streaks below as in the adult, but broader, and not so sharply 
defined. N. Am. at large, breeding in most if not all of its range ; winters from the southern 
border southward; a common inhabitant of thickets, swamps, and morasses, less frequently of 
mixed woodland. Nest usually under a stump or log, of mosses, leaves, and grasses, lined with 
rootlets; eggs 4-6, brilliant white, profusely speckled, 0.80 X 0.60. 
137. S. n. nota'bilis? (Lat. notahilis, noteworthy.) Wyoming Water Thrush. Described as 
identical in coloration with the last, but larger; wing 3.25 ; tail 2.50 ; bill from nostril 0.50 ; 
its depth at base 0.25 ; tarsus 0.83 : middle toe without claw 0.56. Wyoming, one specimen : 
very doubtful. 
138. S. motacilla. (Lat. motoctZZa, a wag-tail. Seep. 284.) Large-billed Wagtail Warbler. 
Louisiana Water Thrush. Very similar to S. ncevius; larger; length 6.00-6.25 ; extent 
10.00-10.75 ; wing 3.00-3.25 ; bill especially longer and stouter, over 0.50 ; tarsus nearly 1.00. 
Under parts white, only faintly tinged, and chiefly on the flanks and crissum, with buff" (not 
sulphury -yeUow) ; the streaks sparse, pale, and not very sharp ; throat, as well as belly and 
crissum, unmarked ; legs pale. I have yet to see a specimen I cannot distinguish on sight ; 
the size of the bill is by no means the only character, though it is a principal one. Eastern 
U. S., rather southern, and not very common ; N. to Massachusetts regularly, sometimes to 
, Maine ; W. to Kansas, Indian Territory, and Texas ; more abundant in the Mississippi VaUey ; 
breeds in its U. S. range at large ; winters extralimital. Habits, nest and eggs like those of 
S. ncevius. A sweet and skilful songster. 
41 . OPOROR'NIS. (Gr. oTrcopa, ojoora, autumn ; opvis, ornis, a bird : noting the abundance of 
0. agilis in the fall.) Bush Warblers. Bill of ordinary Sylvicoline characters. Rictal 
bristles short but evident. Wings pointed, much longer than tail ; 1st quill nearly or quite 
longest. Tail nearly even, with acute feathers ; wings and tail unmarked, like the back. 
Under tail-coverts long and copious. Tarsus about equal to middle toe and claw. Feet pale- 
colored; back, wings, and tail olive; under parts yellow; black or ashy on head. Sexes alike. 
139. O. a'gilis. (Lat. agilis, agile, active.) Connecticut Warbler. Olive-green, becoming 
ashy on the head; below, from the breast, yellow, olive-shaded on the sides ; chin, throat, and 
breast dark ash ; a whitish ring round eye ; wings and tail unmarked, glossed with olive ; 
under mandible and feet pale; no decided markings anywhere. Length about 5.50; extent 
Analysis of Species. 
Head without black ; crown and throat ash ; a whitish eye-ring 
Head with black ; line over eye and under parts yellow . . . 
. agilis 139 
formosa 140 
