THE BALTIMORE ORIOLE 317 
ture is composed very largely of long, spring-like horse-hairs, 
so tightly woven together that even when the end of a hair 
waves freely in the air, it is impossible to pull it out. Here 
BALTIMORE ORIOLE AND NEST. 
is genuine weaving, done with hair and fibrous fragments of 
soft, weathered bark. Let it be remembered at this point 
that not even the higher apes know how to weave a nest or a 
roof. 
