384 
INSECTIVOROUS BIRDS. 
and constant company of its faithful mate. This note, 
uttered at intervals of half a minute, is like the sound of 
tsh 3 tsh tsh tshe tshe , from low to high, but altogether so 
shrill and slender as to sound almost like the faint filing 
of a saw. This species extends its migrations to New- 
foundland according to Pennant. Its nest, like that of 
the following species, to which it is much allied, will 
probably be found on the ground, or in the hollow of a 
decayed tree. 
The Black-Poll Warbler is 5J inches long, and in alar extent. 
The crown and hind-head is black (in the male), the latter bounded 
behind by greyish white. Cheeks white ; from each side of the 
lower mandible runs a chain of small black spots becoming larger on 
the sides ; primaries black, edged with greenish yellow. Back ash, 
a little inclining to olive, and largely spotted with black. Tail black, 
edged with ash ; vent white. Bill black above, yellowish white be- 
low. Iris hazel. Legs and feet yellow. 
BLACK AND WHITE WARBLER, or CREEPER. 
(Sylvia varia , Lath. Audubon, pi. 90. Orn. Biog. i. p. 452. Certhia 
maculata , Wilson, iii. p. 23. pi. 19. fig. 3. Phil. Museum, No. 
7092.) 
Sp. Charact. — Varied with black and white; the crown striped 
with black ; belly pure white. — Male, with the throat black. — 
Fewule and young , with the throat greyish white. 
This remarkable bird, allied to the Creepers, and of 
which Vieillot forms a distinct genus,* is another rather 
common summer resident in most parts of the United 
States, and probably migrates pretty far to the North. It 
arrives in Louisiana by the middle of February, visits 
Pennsylvania about the second week in April, and a 
week later appears in the woods of New England, pro- 
tracting its stay in those countries till the beginning of 
October, and lingering on the southern limits of the 
* Mniotilta. 
