Scott, they claim that we have about 4 million, at least I think that is the last number I heard it's bound to change by about a million a day. How they came to that number is beyond me. I'm a Texas Parks and wildlife volunteer and we don't count hogs, not that counting would help.
We don't have them in all parts of Texas but it's getting close. There are not many in the desert regions except where there is water, such as a spring,creek or artificial water source.
Hogs can not exist without water! However if they can find water no other terrain will stop the spreading of them! Within 30 minutes of birth they are all terrain vehicles, it is unbelievable what they are capable of climbing, jumping or otherwise navigating. We have a saying "it's not a matter of if you have hogs, it's a matter of when you will have them"
They are very unique and incredible animals of survival. I love to hunt them but wouldn't wish them on my worst enemy at the same time. They are devastating to the habitat and many animals that inhabit the area they invade.
say you have a mature sow and a boar.A sow can breed at 6 months or younger. It takes her 3 monhts 3 weeks and 3 days roughly to give birth and she will breed back within 12-14 days. I think the average litter is 6-8 ,I've seen many more per litter. say there is an average of 50/50 sex ratio and they have 6 per litter that will breed by 6 months if not sooner where food is good.
By my guestimate under ideal situation 2 hogs can turn into over 100 hogs in a year and a half.
I have seen some exact statistics somewhere but I can't seem to find them.