Rural Crime: Who Dug the Hole?

 It's wet, wet, wet. Heavy rain and thunderstorms interspersed with muggy sunshine. As a result we have a new family in the front garden.

More sinister is the following, which appeared suddenly last week.

 Question is, who dug it?  A woodchuck? The Brazil football team?  No it's too small for either of those. Whoever did it, left a mess outside.
  It's  a  mystery, except that yesterday I spied a small stripy personage exiting the hole.

Nothing to do with me!  Just exploring......