2i 4 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 : 



Subject imitated. Se< ?f- Ti es Exact 



warblers, reproduced, reproductions. 



House-sparrow's chissick . n 3 J \A ^ 



tell tell . . . . 9 34 / 



Brown Wren's call 8 361 



[43 

 song 2 7) i 



Starling . . . .11 23 



Warblers' tewy ... 9 19 i 



Swallow .... 8 39 i 



Wagtails .... 8 21 2 



Chaffinch fink ... 6 20^ 



twit ... 6 9/ 



Blue Tit .... 7 15 2 



Butcher-bird ... 7 12 i 



Martin . . . . 6 15 



Corn-crake .... 5 15 i 



The imitations sung by the sedge -warbler are 

 generally remarkable for correctness ; but some of 



