That's a joke...no way can an animal live for any length of time without a head. They have to be able to take in nutrition somehow.
http://www.miketheheadlesschicken.org/
If you look closely, there is a straw sticking out of the hole. Apparently, Mags likes strawberry milk shakes...
No, you're right. It's a joke.
One animal that can live without a head, however,{ until it starves to death} is the cockroach. It has no brain--- just a series of large ganglia that runs down its body, and coordinates its nervous system.