Groundhogs and woodchucks are the same species. They are just called by both names. Groundhogs in Missouri and Illinois live just about everywhere. They often are in medians of highways, at highway exit ramps, in the grassy areas around shopping plazas, and people just don’t notice them. They live underground and eat mostly grasses, clover, dandelions, and other weeds and vegetation. They are much like goats when it comes to being natural ‘grass mowers’.
There are many property owners who love having groundhogs on their land because they control weed populations, they keep the grass somewhat mowed, and they till and aerate the soil for the next season. They keep to themselves for the most part, and go to ground when people, pets, and yard workers approach. The most common calls we get concerning woodchucks are citizens concerned about the damage a groundhog may be causing by burrowing under a shed, driveway, or patio.