A buzzard primary, looks very similar to Jon's feather...http://www.bvo.zadweb.biz.hr/images/ptice/perje/Pero primarno Skanjca 2.jpg
not sure about the predator at all, but i reckon those hazelnuts were probably eaten by a some sort of vole!
stuart
A buzzard primary, looks very similar to Jon's feather...http://www.bvo.zadweb.biz.hr/images/ptice/perje/Pero primarno Skanjca 2.jpg
Probably why he lost a feather, ....was there any blood or body parts around, this doesn't look like the scene of the crime to me.