The Birds' Calendar 



yellow on the top of the head. It became very 

 abundant, and I occasionally heard its music, 

 which, if it be its full song, is hardly distin- 

 guishable from the vigorous note of the red- 

 start. It often happens that the migrants are 

 not heard in full song while on their travels, so 

 that one who meets them only during that period 

 is unable to judge adequately of their vocal 

 power. 



The altitude of the " chestnut -sided " from 

 the ground is greater than that of most of the 

 warblers, being often found among the topmost 

 branches of tall trees, like the yellow-rumps 

 suggesting the remark that in the case of most 

 birds it is quite as necessary to know the mark- 

 ings on the under side of the body as those on 

 the back, as they are habitually found higher 

 than one's head. In general the characteristic 

 marks are on the head (top and side), throat, 

 and breast. 



The knowledge one can gain of any bird 

 during May is necessarily meagre, as all the facts 

 pertaining to nidification, and very often an 

 acquaintance with their songs, must be gathered 

 at another time. But during the month one 

 can obtain in the Ramble and in all other 

 favorable localities at least an intelligent and 

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