Being polite, this guy has a little too much free time on his hands. And a bit of Deliverance in the making. Worth watching to the end! And, he is even going to eat the pig.
This is not hunting for meat, it is pest eradication - like shooting rats at the city dump. Most of the larger feral pigs - the boars, in particular - are gamey to the point of being inedible anyway (and then there is the trichinosis concern).
Buzzards gotta eat, too.