[caveat emptor]

My thoughts were, well how did nature take care of over population of one species.

It seems to me there's no such thing as "over population" (or under, or just right) in nature. Stuff happens.

[SkyDancer]

Well, yes and no. When areas are over populated there’s not enough food. So that species will die out somewhat and what food they ate slowly recovers and then they come back.