5O FIELD KEY TO THE LAND BIRDS. 
parts whitish gray. Otherwise like the Ruby-crown, 
with which it associates in the winter. 
148a. BLUE-GRAY GNATCATCHER. 
Polioptila caerulea. — Length, 4s inches. Upper parts 
blue-gray, a black line on the forehead and above the 
eye; tail white and black; underparts grayish white. 
This is a Southern bird, but has been found in summer 
as far north as Maine. 
THRUSHES. 
Turdidae. 
_-77 Bini. — Notched at point. 
— @ Foon. — Insects, worms, _ berries, 
S cherries, and grapes. 
\ 
First quill very short, the next three 
of about equal length. 
Some species of Thrush prefer for their domicile 
gardens and orchards, even in villages and_ cities. 
Others during their season never leave the shadiest 
part of the woods. All but a few stragglers go South 
in winter. Most of the species are fine songsters. 
149. WOOD THRUSH. Turdus mustelinus. — 
Length, 84 inches. Bright red-brown on head, be- 
coming gradually a darker grayish brown toward the 
tail; underparts white, with many large round black 
spots. 
150. WILSON’S THRUSH. VEERY. Turdus 
fuscescens. — Length, 74 inches. Upperparts red- 
brown; underparts white, with small red-brown spots ; 
sides white. 
151. GRAY-CHEEKED THRUSH. Turdus 
aliciae. — Length, T§ inches. | Olive brown above, 
white around eye ; throat and belly white ; breast very 
light buff, spotted with black ; sides grayish. 
152. OLIVE-BACKED THRUSH. Turdus 
ustulatus swainsonit. — Length, 7 inches. Upper- 
parts dark brown, buff around the eye; throat and 
