94 BIRDS OF FIELD, FOREST AND PARK 



rolled over and over in a series of intertwining 

 circles. 



The upper parts of this bird are a nearly 

 uniform cinnamon-brown, duller than the color 

 of the Wood Thrush. The under parts are 

 white, except the breast which is tinged with 

 buff, faintly marked with spots of brown. It is 

 slightly smaller than the Wood Thrush. Their 

 nesting range is from New Jersey to Newfound- 

 land. They also spend the summer in the Alle- 

 gheny Mountains as far south as North Caro- 

 lina. They winter in the tropics, as do all this 

 family. 



The Olive-backed Thrush. (Swainson's 

 Thrush.) This Thrush, when seen in its northern 

 migration, is usually silent and will not be found 

 unless one looks carefully for it. They are in 

 small bands that keep to cover, appearing about 

 New York in the middle of May. They are to be 

 seen for a few days only, then pass along to 

 summer homes in the evergreen woods of the 

 North. I hear them singing in the middle 

 heights of the Catskills in late May, and again 

 in the spruce woods of northern Maine later in 

 the year I find them in abundance. There they 

 are the most common Thrush; the Hermit is 

 rarely heard and only occasionally the Veery, 

 but the Olive-backed sings in every spruce 

 thicket. 



In migration they have several call notes, 

 ''chick,'' ''pit,'' ''peep," but in the nesting 

 grounds, when I invade their dark domain, I 

 hear only a sharp "puck, puck." They are good 

 singers, in tone quality somewhat resembling 



