94 THE WARBLERS 



and swelling throat, turning his head from side to side like the grass- 

 hopper-warbler ; but unlike the latter bird, Savi's warbler will allow 

 of a close approach without showing any signs of disturbance. As 

 for the trill, the striking point about it is that it runs on quite con- 

 tinuously for a couple of minutes or so, soon recommencing. It is 

 louder than that of the grasshopper-warbler, and possesses a more 

 metallic click." 



