266 ANIMAL LIFE 
oriole (Fig. 161). Not all birds make nests. On the rocky 
islets of the northern oceans, where thousands of puffins 
and auks and other maritime birds gather to breed, the 
eggs are laid on the bare rock. At the other extreme is 
the tailor bird of India, which sews together leaves by 
means of fibrous strips plucked from a growing plant to 
| 
Fig. 160.—Nest and young of the Rufus humming-pird ( 7yochilus rufus), Photograph 
by J. O. SNypuR, Stanford University, California. 
