however, for the yellow warbler appears to be the favorite victim of the 
reprobate cowbird. Sometimes in their efforts to get rid of the m- 
truder's egg, the warblers will build a layer or another nest over the 
unwelcome egg. "The food habits of the yellow warbler are all that 
could be desired. It freely visits farm premises and feeds on minute 
insects of many kinds." Spiders, moths, bugs, flies, canker worms and 
grasshoppers are included in this warbler's bill of fare. 
CHESTNUT-SIDED WARB'ER—iDendroeca pennsylvanica.) 
Crown bright yellow; a black line behind the eye; front part of 
cheeks black; back streaked with black, and margined with bright olive 
green; wing bars yellowish white; tail black; sides chestnut; under 
parts white. 
Female, similar but somewhat duller in color. 
Length about five inches. 
Arrival. April 25 to May 15. 
Favorite Haunts. In briar tangles, shrubbery and bushes, in 
pastures and especially in clearings and along the highways. 
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