Set onha^ a rut ic ilia . 
Concord, Mass. Nest building. 
1399. a long, transparent, silky-looking fiber - apparently that of 
June. a Milkweed stalk - to a gray birch in front of the cabin and 
( 2 ) placing it at the intersection of a rather stout branch with 
the main stem began moving it about until its position suited 
her when she pressed it down firmly by rubbing it with the 
side of her head which she turned slowly from side to side. 
This was literally the first bit of nest material that was 
put in the crotch. Many others of an apparently similar kind 
were brought during the forenoon and treated in the sane way 
although the bird had to use her bill rather vigorously in 
tamping some of the more refractory ones into place. She 
worked busily and steadily until noon when the foundation o.f 
the nest was finished. 
At about 2.30 P.M. she began the frame by attaching one 
end of a strand of fibrous material to the right hand side of 
the trunk a little above the branch on which the foundation 
was laid and fastening the other end to the foundation on the 
same 
other side, the strand inclining downward at an angle of a- 
bout 30 or 40 degrees. Next another strand was placed on the 
left side in the same position as the first the ends of the 
two overlapping on the trunk. Then a third piece was brought 
and one end rubbed lightly against the center of the strand 
on the right, the opposite end being carried a little beyond 
