Nest of Chestnut-sided Warbler, illustrating how the young foster Cowbird destroys 

 the brood. Nest now contains a Cowbird, a young Warbler and an egg (p. 225) 



The condition of the Chestnut-sided Warbler's nest two days later. The young 

 Cowbird has ejected the young Warbler, and fills the nest (p. 225) . 



