Pentatoma

Forest bug / red-legged shieldbug (Pentatoma rufipes).  With a name like that you feel it ought to have five .. toes, or something.

I'm hunting a tiny leak in the huge water butt.  It only manifests itself as a slow growing puddle around the base so it's not exactly obvious.  The only thing I could see that was potentially suspicious was the seam joining the two halves so I added lots of sealant there.

Water butt bottoms are not overly photogenic but this fellow arrived so we have ... a bug butt on a butt butt.

Or something.