Check Out A Weasel Riding A Woodpecker Through The Sky

This picture of a Woodpecker flying through the air with a weasel ridding on its back has been blowing up the internet. rightfully so too. this picture is down right amazing, adorable and everything that I want to see any time I look out my window. If small furry animals are not ridding on the backs of birds then what is the point of living?

Why is this weasel ridding a woodpecker? Is it doing this for fun? Is the weasle trying to eat the woodpecker? or was the bond made and these two are forever partners going through life trying to save Eywa?