214 E VOL UTION OF BIRD- SONG 



the partridge with facility ; I have, however, often 

 seen them evidently exerting themselves in pro- 

 ducing the cry of another bird ; one in particular 

 seemed compelled to completely extend his wings 

 when imitating the cry of the peewit. 



MIMICRY OF THE SEDGE-WARBLER 



I have made records of the songs of about 

 fourteen sedge -warblers heard near Stroud. The 

 following were the principal imitations : 



The imitations sung by the sedge- warbler are 

 generally remarkable for correctness ; but some of 



