Birds of America
By John James Audubon, F. R. SS. L. & E.
GENUS III.--TRICHAS, Swains. GROUND-WARBLER.
Bill of moderate length, similar in form to that of Sylvicola, differing
only in being a little decurved. The general form does not differ materially
from that of Sylvicola, the head being ovate and of moderate size, the neck
short, the body rather slender; the feet of moderate length, slender; tarsus
slender, much compressed, longer than the middle toe with its claw, anteriorly
covered with eight scutella, of which the upper are blended; toes of moderate
size, hind toe proportionally large, lateral toes equal, fourth adherent at the
base; claws rather long, arched, much compressed, laterally grooved, very acute.
Plumage soft and blended. Wings rather short, convex, considerably rounded, the
third and fourth quills longest, the fifth little shorter. Tail of moderate
length, rounded, always plain, or without white spots.