friend of mine throws sticks at the game birds up north while he's moose hunting.
I would not consider airsoft accurate enough to hit a partridge in the head... you're more likely to injure it and/or scare it off.
On top of that, they probably get hit in the head harder by bugs when they're flying. :P
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.