17 



Fig. 10. A close viexc of the male bird about to enter the nest- 

 ing box. 



camera he eould promise me a bird ^l^^^eliTpt^ oi 

 arrived at his house and was ^1^°-" ^^.^^/"^ ,„/ /"eond 

 Chickadees in a bird box attached to the siU ot a secon 



a dwelling. 



