At least one of them tends to get it right. Groundhog day is the only US holiday named after an animal. All 14 species of marmots are true hibernators. During the winter their body temperature drops to a few degrees Celsius. Woodchucks live pretty stoic and solitary existences.
Males live alone and females live alone.
Males tend to mate with neighboring females, and their offspring tend to leave home before their first hibernation. All other species of marmots are much more social. While woodchucks tend to be pretty silent, their cousins tend to be quite vocal and emit loud alarm whistles or chirps at the slightest provocation. Some species Eurasian marmots vary the rate at which they whistle as a function of terrain. Prof. Alexander Nikolskii's long-term studies have shown that marmots call faster when they live in areas with more vertical relief and broken sight lines.