While horses are now a familiar sight in North America, they were actually native to Eurasia and only arrived in North America through human introduction.
* Origin: Horses evolved in North America millions of years ago. However, they went extinct on the continent around 10,000 years ago.
* Reintroduction: Horses were reintroduced to North America by European colonists starting in the 15th century.
So, while horses have a deep history in North America, they are not native to the continent in the sense of having originated there.