6 
BLUE YELLOW-BACK WARBLER. 
as that of the other ; but the eggs are smaller, usually four or 
five in number, and of a rather deeper greenish blue. 
This bird is likewise found in the state of Georgia, and 
has not escaped the notice of Mr Abbot, who is satisfied of its 
being a distinct species from the preceding. 
BLUE YELLOW-BACK WARBLER. — SYLVIA PUSILLA. 
Plate XXVIII. Fig. 3. 
Parus Americanus, Linn. Syst. 341. — Finch Creeper, Catesb. i. 64. — Lath. ii. 558. 
— Creeping Titmouse, Arct. Zool. 423, No. 326 Parus varius, Various coloured 
little Finch Creeper, Bart. p. 292. — Peale's Museum, No. 6910. 
SYLVICOLA AMERICANA. — Swainson. * 
Sylvia Americana, Lath. Ind. Orn. ii. p. 520. — Bonap. Synop. p. 83. — Sylvicola 
pusilla, Sw. Synop. Birds of Mex. Ann. of Phil. p. 433. — Zool. Journ. No. 
10, p. 169. — The Blue Yellow-backed Warbler, Aud. pi. 15. male and female ; 
Orn. Biog. i. p. 78. 
Notwithstanding the respectability of the above authori- 
ties, I must continue to consider this bird as a species of 
Warbler. Its habits, indeed, partake something of the Tit- 
mouse ; but the form of its bill is decidedly that of the Sylvia 
genus. It is remarkable for frequenting the tops of the tallest 
trees, where it feeds on the small winged insects and caterpillars 
that infest the young leaves and blossoms. It has a few feeble 
chirruping notes, scarcely loud enough to be heard at the foot 
of the tree. It visits Pennsylvania from the south, early in 
May ; is very abundant in the woods of Kentucky : and is 
also found in the northern parts of the state of New York, 
Its nest I have never yet met with, f 
* There is nothing more annoying than the unravelling of names. That of 
Americana, without doubt, seems to have been the specific appellation first 
applied ; and if we are -to adhere to any given rule in nomenclature, that 
should be now adopted. The present species has also been made typical of 
the group which is confined to the New World — E d. 
f According to Audubon, the nest is small, formed of lichens, beautifully 
arranged on the outside, and lined with the cotton substances found on the 
