The grazing gossalizards' wide mouths help them graze on sproutstalks, their primary food. As sproutstalks have a nutritious tuber, with time they regenerate, and a grazing gossalizard can feed on it again. Its fangs were kept in its transition to a herbivore, for they now serve a different function: scraping at ice to uncover food.
The grazing gossalizards are not naturally gregarious, but merely happen to congregate in areas of abundant and closely distributed food. The sheer numbers soon exhaust the food supply of an area, forcing them to move elsewhere. In areas of less or patchily distributed food, (such as the area depicted in the image above) grazing gossalizards have a sparser distribution.
The grazing gossalizards migrate between the Drake Tundra and Drake Polar Scrub depending on food availability and temperature. This usually means they migrate to the Drake Polar Scrub when it's especially cold in the Drake Tundra, and move back to the Drake Tundra when it's less cold.
As it no longer hunts, its warfarin-silk is useless. Consequently, silk glands are reduced or even absent in most individuals. Since their ancestor was a carnivore they still supplement their diets with meat from dead carcasses they find.