This rooster is constructed entirely from automobile bumpers.
Notice those dark clouds in the north. I was racing south at the time trying to outrun severe thunderstorm threats for the evening. We made it.
So what are bird pots? I don't know. I did notice a lot of gourd-shaped bird nests which would be strung out suspended on a long line on farms and wonder if they are what the sign refers to. Maybe someone from the South could comment plus adding what type of bird would nest inside a gourd.