What 'orrible things; I didn't realise until tonight and a quick google to check. I thought they were just cheeky scavengers that flew off with ladies bracelets etc.
It had been a great day, and I sat out on the front step contemplating my achievements, overlooking the common, with a nice cold drink, and suddenly see a magpie swoop on something.
With the location, I guessed it was a field mouse and stood up to have a look, only to see this bastard bird pecking some tiny little bird to death, that was by now tweeting it's displeasure.
Immediate reaction was to shoo it off, but then thought the victim could end up just suffering a slow painful death from it's injuries, so I just went in. I'm still wondering whether I did the right thing