This sounds like it could be the plot for the next Godzilla movie but the NY Times reports the area of Japan where a Tsunami and subsequent reactor meltdown occurred in 2011 has been overrun with wild, radioactive boars: Hundreds of toxic wild boars have been roaming across northern Japan, where the meltdown of the Fukushima nuclear plant six years ago forced thousands of residents to desert their homes, pets and livestock. Some animals, like cattle, were left to rot in their pens.