Mountain-Bluebird 531 
After the breeding season small family parties wander 
up the mountains to well above timber line ; probably 
they find insects more abundant there late in the season. 
This Bluebird, like its eastern cousin, easily learns to 
make use of nesting-boxes placed on trees and houses for 
it, and will also build under a cornice or in any suitable 
crevice about human habitations or barns. 
LL 2 
