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 



