Garter snakes are named for the yellow stripes that run down their body which resemble the stripes on garter belts. The common garter is usually small to mid sized, although they can grow to lengths of over three feet long, and can be found in a variety of different habitats. The common garter eats small mammals, slugs, worms, insects, reptiles and amphibians, which it finds by following their scent. The snake will use its tongue to sample and collect trace chemicals in the air and the environment around it. It transfers these chemicals to the Jacobson's organ, located on the roof of the mouth, which transfers the information to the snakes brain. So even though they have nostrils these snakes, in effect smell, using their tongue.