102 
NEW-YORK FAUNA — BIRDS. 
THE CHESNUT-SIDED WARBLER. 
Sylvicola icterocephala. 
PLATE LIX. FIG. 134 (Male). 
(STATE COLLECTION.) 
Motacilla icterocephala et pensylvanica. LinN-^eus, Syst. pp. 333 and 334. 
Bloody-side Warbler . Pennant, Arct. Zool. Vol. 2, p. 405. Vieillot, pi. 90. 
S, pensylvanica. Wilson, Am. Orn. Vol. 2, p. 99, pi. 14, fig. 5. 
S. icterocephala. Bonaparte, Ann. Lyc. Vol. 2, p. 80. Audubon, folio, pi. 59; Orn. Biog. Vol. 1, p. 306. 
Chesnul-sided Warbler. Nuttall, Man. Ornith. Vol. 1, p. 380. 
Chesnut-sided Wood^ivarbler. Audubon, Birds of Am. Vol. 2, p. 32, pi. 81 (male and female). Giraud, Birds 
of Long island, p. 63. 
Characteristics. Crown yellow. Sides, from the bill, chesnut. Wings bifasciate with pale 
yellow. Beneath white. Female and young : Crown greenish yellow ; 
sides pale rufous, sometimes scarcely apparent. Length, 5 inches. 
Description. Bill short, rather straight, with porrect bristles at the base, extending beyond 
the nostrils. Tail slightly emarginate, extending O’7 beyond the tips of the closed wings. 
Second quill longest; the second, third and fourth quills sinuated on the outer webs towards 
the tips. 
Color. Greenish and slate streaked with black. Wings and tail brown. Two or three 
outer tail-feathers white on their inner webs. First-and second row of coverts broadly tipped 
with yellow. Secondaries greenish yellow on their outer vanes. Crown bright lemon-yellow. 
From the angle of the mouth, a distinct black line goes over the eye ; and from the same 
place, another somewhat curved beneath the eye, and leaving posterior to the eye a white 
spot. Female and young: Wing-coverts not so distinctly tipped with yellow; the black 
lines surrounding the eye obsolete. Sides with indistinct chesnut. Yellow crown tinged 
with green. 
Length, 4'5-5’0. Alar extent, 7’5-8’0. 
This rare Warbler I observed first in the western part of this State on the 20th of May, 
although it probably reaches the southern portions earlier. The young were obtained a few 
miles above the city, near the Hudson, August 20. It winters in Mexico, and does not 
appear to advance much farther north than Massachusetts. Feeds on flies and other insects. 
