Who Is This? What Is This? Where Is This?

I'm not writing about this photo that recently popped up in my camera!

I'm leaving it all to your imagination - answer the questions in the title 

or ask some more:

As I walked along a Wildwood trail a few days later, see who again popped up out of the leaves -
but with a slight change!

Now how do you explain this?
Wildwood Park is a magical place , but there has to be another reason for the green.