Mike the Headless Chicken
Mike the Headless Chicken (April, 1945 – March 17, 1947) was a male Wyandotte chicken that lived for 18 months after he was beheaded, surviving because most of his brain stem remained intact, and a blood clot prevented him from bleeding to death. After the beheading, Mike achieved national fame; he died in March 1947.
Source: Wikipedia — Mike the Headless Chicken (CC BY-SA 4.0)