So earlier today, I was cleaning my nest like I do once a year, and I found a pack rat under my nest! He told me that he was kind of like my maid servant and that he would clean up after me and eat the leftovers. All these years, I never knew that my future best friend was living right under me. He mentioned that this relationship of him cleaning my nest, and in return he gets food, was an example of mutualism. I’m pretty sure it means both animals benefit…. Or at least that is what the pack rat told me.