Setonhaga rut ieilla . 
Concord 
1 OOO 
1 ob o 9 
June . 
(3). 
Nest building. 
Mass. 
that of the left hand strand. Next a fourth strand was rubbed 
on the trunk a little above the upper end of the left hand guy 
to the middle of which the opposite end was fastened by rub- 
bing the two together. Each piece of fiber was fashioned in- 
to the general shape of the nest as soon as it was attached 
at both ends and more were brought and carried from point to 
point until a complete framework of about the size and shape 
of the half of a hen's egg was erected around and resting on 
the foundations. This framework ’was so delicate that it 
looked as if the merest breath of wind would blow it away. 
During its construction the bird worked entirely from the 
outside, standing on the branch and shaping each piece of 
fiber with her head or beak. 
The next day ( Llay 13th) she began using cocoon fibers 
as well as milkweed bark. The former she obtained from a 
groove near the top of the cabin door in front of which she 
would hover on rapidly vibrating wings until the exertion 
compelled her to alight for a moment to rest and regain 
breath 
either on the top of the door or its hand knob. As soon as 
she had filled her bill she would fly to the birch, alight on 
the branch and distribute her load around the inside of the 
nest; then popping into it and squatting down with head and 
tail raised and back deeply hollowed she would move slowly a- 
round to the right and then to the left, making usually a 
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