Nothing. These are the same species.
The Eastern Bluebird is the state bird of Missouri.
The eastern bluebird is Sialia Sialis.
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 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 same as a western bluebird's: feathers.
It is bluebird!
a cat
The Eastern Bluebird.
It's simply a descriptive name. The bluebird takes its name from its bright blue feathers, and the Eastern variety is found in the eastern part of North America.
The common name is bluebird, Latin name is Sialia Sialis.
mountain bluebird