SOMERSET HILLS 99 



be very plainly distinguished when the 

 bird is in the tops of the highest trees 

 and often makes it identifiable when no 

 other mark can be seen. This species 

 of Warbler is a migrant in the Somerset 

 Hills, usually being found on hillsides, 

 among birch groves and in conifers, fre- 

 quently together with Myrtle, Black- 

 poll and Chestnut-sided Warblers. This 

 bird's note is very beautiful and full, 

 and when once learned is not easily for- 

 gotten. It builds its nest low, usually 

 in an evergreen, where it deposits its 

 whitish eggs, which are spotted with 

 reddish brown and of which the bird 

 generally lays four. 



The Olive-backed, Gray-cheeked and 

 Bicknell Thrushes are all very similar, 

 with plain olive-brown backs and gray- 

 ish breasts, the latter streaked with 

 blackish. There are differences between 

 them, but they are slight. The first may 



