4-6 The number of eggs typically layed
1-3 The number of broods bluebirds may have each breeding season.
70 percent of all bluebirds die before reaching their first birthday.
10 years old was the age of the oldest recorded Eastern Bluebird.
50 yards is the distance a bluebird can spot caterpillars and insects in tall grass.
90 percent was the decline in Eastern Bluebird population during the late 1800s and much of the twentieth century.
12 percent of their body weight is consumed by bluebirds each day. (This is equivalent to a two hundred pound human eating 24 pounds of food each day.)