Shorebirds like oystercatchers make meals of limpets and chitons that sit on rocks, clamped down to conserve their water when the tide is out, like the one below.
How the heck a bird recognised the camouflaged chiton below flummoxes me.
But it did, and this is the result.
A flipped-over limpet is usually left squeaky clean, with no wasted bits of flesh, so I’m not sure why this chiton has just had its foot pecked away or whether any internals have been taken. Perhaps the bird took a peck and decided it wasn’t so tasty after all.