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As time progressed, some Unguliserds would venture into the cold Dingus Tundra to take advantage of the brief periods of abundant vegetation during warm periods. Eventually some populations would establish themselves and adapt to living in the Tundra year-round, becoming the bizarre Shagguliz. While no large predators exist within the Dingus Tundra when the Shhagguliz evolves on the scene, the legs have become longer than their ancestor in a similar fashion to the related Liserlap, since it means a larger stride for every step and thus they can cover more ground with less effort when searching for food. The radiation organ of their ancestors has become useful once more, since it can melt the snow in front of them and expose any bits of hidden flora or the burrows of small fauna for them to then consume. While the Shagguliz is primarily herbivorous during the warm periods, they shift into being generalist omnivores during the long, dark, winter months. The ability to see in infrared in their ancestors has proven extremely important for the Shagguliz as it allows them navigate pretty well during the winter months where nights are extremely long and dark. The rim of the Shagguliz's mouth is now lined by a beak made of keratin to help prevent frostbite since they often handle food that is covered in snow. To process whatever food they managed to acquire, the Shagguliz has convergently evolved powerful throat muscles that compress it inwards and up so it can act like a "tongue" similarly to the Liserlap. Much like their relative, the Shagguliz has also developed specialized grinding plates to help process the food they consume to make digestion, though they construction of these plates are different in configuration and shape since they consume more than flora. The teeth lining their jaws, meanwhile, have become different and serve different functions. The teeth on the front of the lower jaw are long and rake-like, adapted to aid the beak with grabbing food so it can be brought to the "tongue" while the back teeth are more generalized and merely help the "tongue" with processing food. The Shagguliz will even feed on carrion if they come across it, since it is a large source of energy that may provide them time to find other kinds of food.

One way the Shagguliz has adapted to living in the cold is by having a shorter anus-tail and a shorter eye stalk to help retain heat. However, the most noticeable difference from their ancestor and relatives in terms of cold-related adaptations was the development of a shaggy coat. During the warm periods where it is warmer, the coat of fur is about as sparse as that in the unrelated Proto mamal though it is a brownish-grey in color. When it gets cold, however, the full shaggy coat grows in to insulate the Shagguliz from the cold, with the fur being whitish-grey in coloration. The expose skin, meanwhile, is relatively dark in color so it can soak in as much heat as possible though the radiation organ does help provide some warmth as well. Much like their ancestor, the Shagguliz are social creatures, traveling in large groups as they search for any sources of food. Since a large dorsal hump would mean more surface area to lose heat from, the Shagguliz has switched to relying more on vocalizations to communicate with other members of the group. Using specialized muscles around their breathing holes and then inhaling or exhaling in certain ways, the Shagguliz will made a wide variety of high-pitched whistles that can travel a good distance.

The Shagguliz still utilize sexual reproduction, though they only do it during the warm periods in the Dingus Tundra so the produced young have a large amount of food available to aid in their growth before the cold winters return. The way they breed has not changed at all though, with two individuals budding next to each other that then merge together and exchange genes. Then, the Shagguliz pair also irradiates the buds to help further mix up their genes. Then, the merged bud would split into 4 genetically distinct offspring. This allows the Shagguliz to quickly adapt to any changes in their environment, such as an unusually long winter or a very short one resulting in abundant flora growth. The high versatility in reproductive rates, generalistic diet, and their numerous adaptations to a cold climate allow the Shagguliz to positively thrive in an environment too cold for most of their competition such as the otherwise abundant turdles.