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Turdus Swatnsontt.— Cab. 
Olive-backed Thrush. 
It is not very common. _ It is found as far south 
as Virginia, and as far west as lowa. Eggs four 
in number. 
Turdus Ahcie.— Baird. 
Gray-cheeked Thrush. 
It breeds in New Jersey and as far west as 
Iowa. It arrives inthe West about the 2oth of 
July, and breeds the last of June. Eggs four in 
number. 
Turdus Migratorius—Linn. 
Robin. 
The Robin is very common all over the United 
States. It breeds in abundance in the Western 
States. Eggs four in number. It arrives in the 
West about the roth of May, and leaves. in 
September. 
. Stalia Sralis—Baird. 
Blue Bird. 
The Blue Bird is one of the earliest visitors of 
Spring in.the Eastern States. It makes it 
appearance in the West about the 2oth of July, 
and leaves in September. It is very common in 
the East, but rare in the West. In mild winters 
it remains with us in Pennsylvania. I have 
known it to commence breeding as early as 
March. 
