BRITISH BIRDS. 151 



spots, which become numerous and blotched at 

 the thicker end. It is often heard in the midst 

 of a thick covert to utter a pretty constant grat- 

 ing call of c/ta, cha, cha, which it leaves off as 

 soon as it is disturbed, flitting before the pas- 

 senger from bush to bush, singing as it flies 

 along, and sometimes mounting up a little height 

 into the air, as if it were attempting to imitate 

 the Lark, both in its motions and song; but in 

 these it falls greatly short, and its frequently 

 repeated notes have but little melody. 





