Please do not take anything I say as fact, please do research and confirm it that way. Adaptions such as rear fangs, venom, etc may or many not be current. Behavioral adaptions such as swallowing head first, may or may not be current as well. Swallowing head first is a behavioral adaption based on prey that folds in a easy to swallow position. With animals that swallow large prey items whole as compared to head size, this is a very efficient adaption. But not totally necessary. They can and do swallow prey items willy nilly when those prey items are small. Hogs are very prejudiced, that is, they have real obvious characteristics. And we all can see them. They are not efficient at striking, in any way, they sort of push. There is no way on earth you can compare their ability to strike with almost all other snakes. So catching prey by striking is very doubtful. Crawling speed, again, its obvious they cannot outrun lizards, toads, etc. So obtaining prey by striking(many colubrids and crots) or with speed, whipsnakes, racers, even greensnakes and patchnose etc etc etc. Is simply not there. So what do they do. Their adaptions are without question proprietary. They seek and secure their prey, in the ground. They locate the prey and push the prey in their mouths. If you look at this, their headsize, giant mouth, all work in this manner, in the ground, you cannot work to find the head, so the snake just swallows, toads, eggs, lizards, mammals, etc, are swallowed with another adaption, a huge mouth and large rear teeth to push prey down(remember, adaptions are not restricted to one use) Without going on and on, end pt 3

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