Florida's population boom now includes some 500,000 wild hogs whose piggish habits are causing problems for farmers, residents and health officials as well as native flora and fauna.
Source: University Of Florida, Date: June 7, 2005.  

Feral hogs resemble domestic hogs, but are usually leaner with different behaviors to survive in the wild, according to researchers with the University of Florida's Institute of Food and Agricultural Sciences. Wild hogs have an excellent sense of smell and good hearing, but relatively poor vision. They use variety of vocalizations, including an alarm grunt given to sense an intruder that causes a flight response by the rest of the herd. Go to article