3 The number of bluebird species in North America (Eastern, Western and Mountain).
2 Number of bluebird broods per season, and maybe even a 3rd!
3-5 the percent of young birds that return to the territory where they were hatched
45 mph is the speed that bluebirds can fly!
75 percent of the time, when choosing a natural nesting cavity, that Eastern Bluebirds choose an abandoned woodpecker cavity
1934 the year the first bluebird nesting box trail was established in Adams County, Illinois in 1934, by T.E. Musselman.
See our first edition of Bluebirds by the Numbers