Calculationsbased ontheanimal'sjaw bones suggestitcould have bitten into its preywith a force of 150 kilonewtons, or fourtimes the force thought to be exerted by the jaws of a T. rex.
"We put kestrel boxes up for Springwatch 2008 and although a couple did show interest in one of the boxes, they were driven out by a pair of buzzards who just wouldn't tolerate another bird of prey, " said Nigel.