I read a lengthy articcle in a local Houston (liberal) news paper about feral hogs. I am not sure where they came up with these figures, but read these and tell me if you think they are on or off base.
Average life span, 15 to 25 years.
Two litters per year, as many as 12 piglets per litter
Begin breeding at 6 months of age
In 35 States in the US
Live in nearly all 254 counties of Texas
Average mature feral hog weight, 75 to 150#
Trophey size hog 250-450#
Two million hogs in Texas, nearly 50% of the total US hog population
USDA approved slaughter houses export feral hog meat all across Europe, Italy, and Switzerland.
The article was mostly about Bay or Catch competitions and the laws in Texas and other southern states regarding this and the relation to animal cruelty laws. etc.etc.. They had some good photos though.