How do we know if an animal is an endangered species?

Are your kids wondering: How do we know if an animal is an endangered species? This question came from John, a student from the United States. This episode is Part 1 of a special Earth Day mini-lesson series about endangered animals! Like, share, and vote on the next question here: https://mysterydoug.com/vote

Видео How do we know if an animal is an endangered species? канала Mystery Science