BIRDS OF DURHAM AND VICINITY. 
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Parus Hudsonicus. Hudsonian Chickadee. 740. 
Hiidsonian Chickadees are residents of the northern portion of this 
state, and irregular visitors to more southerly parts. They have been 
taken both in Massachusetts and Connecticut. 
Hylocicbla alicise. Gray-cheeked Thrush. 757. 
This is a northern species that must occur as a late spring and early 
fall migrant, though it has not yet been taken here to my knowledge. 
Hylocichia eAicise bicknelii. Bicknell\s Thrush. 757a. 
Bickneirs Thrush breeds in the White Mountains, and is sure to 
reward the bird student who will persistently search the woods the last 
of May. Both this and the last must be taken to be certainly distin- 
guished from the Olive-back. The Olive-back has a yellowisli eye 
ring and buff cheeks and is 7 to 7.5 inches long. The Gray-cheek has 
neither buffcheeks nor eye rings and is 7.5 to 8 inches long. BicknelPs 
is colored like the Gray-cheek, but is smaller, having a length of 
6.75 to 7.25. 
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