Piate VI 
1a Ales 
RED-WINGED BLacKBIRDS IN JUVENAL PLUMAGE 
Illustrating the law that when the adults differ in color the young of both sexes 
usually resemble the female. 
: ee 
CHICKADEES IN JUVENAL PLUMAGE 
Illustrating the law that when the adults are alike the young resemble them. 
