I knew what dug that hole. The same thing happened last year. It was a mama rabbit creating a proper den for her little offspring...tiny baby bunnies that would be born in just a short time.
Last year, four little bunnies found themselves growing up in our backyard. I watched over them as though they were my own babies. During one particularly harsh spring storm, one of the babies decided to see what all the fuss was about and in the process of checking out the thunder and lightning, became cold and very wet. I have no idea why I went into the back yard to check on them, but it's a good thing I did as this little bunny was gasping for breath and was as cold as the rain pelting it.
I saved his life that day.
Ok, well it's a little life, but it still counts. His brothers and sisters were smart and stayed put - nice and dry. I took him inside the house, wrapped him in a towel, then heated up a microwavable neck warmer and wrapped that around the towel. All the while, I stroked his little chest and tried to get him to breathe normally.

After two hours and a lot of TLC later, he seemed to be doing much better. I put him under my daughter's desk lamp and dried out his fur, then carefully returned him to his den. I named him Rupert.
He grew up with his brothers and sisters and they all hopped off to make their own little marks on the world. We still see signs of their presence everywhere... especially in my flower beds. But, it's ok. I enjoy sharing. I enjoy knowing they visit - even when we aren't looking.
We should all appreciate the world around us and find the beauty in everyday events.