Fucking Bird

Why is it that every animal I feed in Japan attacks me? Last time I was here it was the deer in Nara park, this time a bird. I was sitting under a tree eating lunch and a raven landed nearby and was just hopping round looking for crumbs. Everyone here thinks they are horrible birds, but until today I quite liked them, so I threw it a chunk of bread. It took it and flew off, seemed happy enough, a couple of minutes later it came back. Landed on the seat behind me, snuck up behind me and tapped my back. I went to look round and the bloody thing bit me. If all the wildlife here is like what Ive met so far I understand why the Japanese don't pay much attention to looking after the environment.