Final answer:
The most popular state bird in the U.S. is the bald eagle, with seven states claiming it.
Step-by-step explanation:
The most popular state bird in the U.S. is the bald eagle. Seven states claim this bird as their state bird. Those states are:
- Alabama
 - Alaska
 - Illinois
 - Iowa
 - Kentucky
 - Minnesota
 - North Carolina
 
The bald eagle is a large bird of prey with a wingspan of around 6 to 7 feet. It is known for its striking appearance and graceful flight. The bald eagle is a symbol of freedom and is considered a national symbol of the United States.