How Do You Build A Hog Trap?

There are several sites where you can view instructions on trap-building for free, as well as getting information on hog hunting and related areas. I found two that looked clear and detailed. The first includes diagrams and step by step instructions at limestonemedia.com/how-to-plans

The other one that looked interesting had plans and instructions for different types of trap - round or square - as well as advice on how to use them. This is at hogtrapping.com