221 



As far as my observations go, tliese warblers seem to be 

 imposed on by Cowbirds more than any other unless it be 

 the Chestnut-sided. The percentage of nests containing 

 these obnoxious eggs is quite large and the resulting mor- 

 tality due to the over-crowding of the nest, is also quite 

 large among the little Yellow Warblers. 



Fig. 1S9. NEST OF KINGFISHER. 



