THE BIRD STUDY BOOK 



of nourishment. So insistent is the young Cowbird 

 and so persistently does it pursue the foster parent 

 that it is well cared for and invariably thrives. It 



The Greedy Young Cowbird 



is no uncommon sight, during the days of June and 



July, to see a worn, bedraggled Song Sparrow work- 



[58] 



