Bird Billy ?

[Stan Hillis]

There is a tool that is popular with some duck hunters to do the deed on a wooded bird. It's called a Finisher, and is a slightly curved spike. I don't use them, or feel a personal need for one, but have seen it in use.

[Keith Doty]

Been whacking duck heads on my stocks since school days. Just make sure it's on the outboard side!