A 96-year-old self-taught conservationist dedicated the past 40...

A 96-year-old self-taught conservationist dedicated the past 40 years of his life to saving North American bluebird populations, building and monitoring 350 nest boxes all across southeast Idaho. In part from his conservation efforts, bluebird populations have significantly rebounded.

from Unbelievable facts http://bit.ly/2G84qQA