OUNG PEOPLE readers will per- 
haps recall my previous reference 
to the whims and preferences of 
the birds in their selection of 
building material. The unravel- 
ling of deserted nests will often 
prove an instructive as well as 
humorously entertaining pastime, re- 
vealing in the same fabric evidences 
of great sagacity and what would ap- 
pear perfectly nonsensical prejudices, 
with an occasional piece of positive 
frivolity. Thus we can readily see 
the wisdom in the selection of these 
strong strips of milkweed bark with 
which this vireo's or yellow-warbler's 
nest is moored to the forked branch, 
or the strands of twine with which 
