SOMERSET HILLS 81 



the air, whereas the others stay lower. 

 Tree Swallows nest in hollow trees. 



Cliff and Barn Swallows (Plate 22, 

 p. 151) are dark blue-black above and 

 chestnut below. The former may be 

 told from the latter by a brown instead 

 of a blue rump and a square instead 

 of a forked tail. 



The Cliff Swallow is also called the 

 Eave Swallow. The Cliff Swallow for- 

 merly nested in cliffs, from which it re- 

 ceives one of its names, and as it now 

 builds its nest of mud under the eaves 

 of barns, it is also called the Eave Swal- 

 low. I have seen over sixty nests of 

 these birds under the eaves of one side 

 of a barn, which was about forty feet 

 long. Before there were any barns in 

 this country, these Swallows nested al- 

 together in cliffs. 



The nest of the Barn Swallow is 

 made of the same material as that of 



