Who is this mystery critter?

1. Wanna thumb-wrestle? I'll surely win! 

2. Honk if you're in trouble; I do.

3. When I was born, I was lighter than a stick of butter. Today, I weigh as much as your dad, or mom—or both!

4. Shoot, I'm hungry. I eat half the day.

5. My babies look like naked rats.

6. According to ancient Chinese beliefs, I stop disasters and evil spirits.

7. Black, I'm related to bears. Red, raccoons.

 Bonus clue: Sadly, many animals are endangered. I'm probably the most famous of all. 

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