I was looking online and came across this blog and saw a photo of a Marsh Harrier attacking a Hare. Just scroll down and see.
http://www.birdwatchinglancashire.co.uk/?catu003d0u0026pagedu003d91&paged=110
http://www.birdwatchinglancashire.co.uk/?catu003d0u0026pagedu003d91&paged=110