When the "Angry Birds" product line introduced a piglet, I posted this on Amazon to school them on the basix of modern biology.
I hate to break the news, but pigs are...ahem...not birds, although I'm sure they can be angry. Sensu stricto, they are...well, mammals. Mammalia. Sus scrofa. Different line of evolution. But who knows, maybe some new DNA sequencing can solve our conundrums on this point? Where is the Discovery Institute when you need them?