OLIVE TKEE WARBLER. oS 



Tlie young before tlie first moult, wliich occurs after 

 they leave Europe, are strikingly like tlie young of /S. 

 nisor^ia, and S. orphea, but tbey may be readily dis- 

 tinguished—in addition to the already noticed characters 

 of the formation of the beak — -from S. tiisoria, by the 

 uniform olive grey tint of the upper part of the body, 

 which in the latter bird is clear grey, and on the back 

 slate-coloured. The second and third primaries of S. 

 nisoria are also of almost equal length, but in S. olive- 

 torum the third is considerably longer than the second. 

 From S. orpliea they may be distinguished by the 

 under tail coverts and belly in S. orphea being tinted 

 with rust yellow, while in the young of S. olivetorum 

 the tint is greyish. 



This bird has been figured by Gould, B. of E., and 

 by Count Miihle, in his Monographic der Europaischen 

 Svlvien. 



