Nothing. These are the same species.
The bluebird is a member of the thrush family, Turdidae. The eastern bluebird is Sialia Sialis.
The main difference is their range. The mountain bluebird lives mainly in the Great Plains. The Eastern bluebird lives in prairies, orchards and clearings in primarily the eastern US. As for appearance, the major difference is that the eastern bluebird has an orange breast and the mountain bluebird has no orange anywhere.
The scientific name of the eastern bluebird is Sialia sialis.
The Eastern Bluebird is the state bird of Missouri.
The eastern bluebird is Sialia Sialis.
6 to 10 years is a Eastern bluebird life span.
The predator of an Eastern Bluebird is a House Sparrow.:) hope I could help
A eastern bluebird is covered in feathers.
Eastern BluebirdThe official state bird of New York is the Eastern Bluebird, adopted in 1970.The Eastern Bluebird is the state bird of New York
the weight of the eastern bluebird is 0.84 to 1.09 oz (24 to 31 g)
The same as a western bluebird's: feathers.