SOMERSET HILLS 91 



other Vireos, for instead of being a 

 single call, it is a warbling medley. 



The Blue-winged Warbler is like the 

 White-eyed Vireo, in regard to the 

 choice of its haunts. It has a preference 

 for swamps. It is blue-gray above, and 

 bright yellow below. Through the eye 

 is a black line, which mark is its dis- 

 tinguishing characteristic. In 1910 I 

 saw it frequently at Ravine Lake, but it 

 did not appear in 1911. It is one of 

 the few song birds that hybridize in a 

 wild state. Sometimes it mates with the 

 Golden-winged Warbler. The hybrids 

 are divided into two classes. Those with 

 white breast are termed the Brewster's 

 Warbler, and those with yellow are 

 called the Lawrence's Warbler. The 

 former is more frequently seen. Of the 

 latter not more than two dozen speci- 

 mens have been recorded. 



The colors of the Parula Warbler are 



