Commonly known as groundhogs, they are a large terrestrial rodent belonging to the squirrel family, known for digging holes and building nests on the ground. Widely distributed in temperate and frigid regions of the Northern Hemisphere, including grasslands in Asia, mountainous areas in North America, and forest edges in Europe. The body is thick and robust, usually between 50 and 70 centimeters in length, with short and dense fur that helps maintain body temperature in cold environments. The limbs are short and strong, suitable for digging, and the sharp claws are digging tools. It is a social animal that often forms groups of multiple individuals and lives together in a complex underground tunnel system. It is a diurnal animal.

The tailless spiny guinea pig is a type of terrestrial medium to large herbivorous rodent, and is a member of the only genus in the tailless spiny porpoise family, the tailless spiny porpoise genus. Tailless spiny guinea pigs are distributed in Central and South America, resembling spiny porpoises in appearance, but with a larger snout and light colored spots and horizontal lines on the body. The tailless spiny guinea pig has a length of 50-77 centimeters, excluding a short tail of 13-23 centimeters. It weighs 6-14 kilograms and is the sixth largest rodent in the world. Similar to guinea pigs, they have square heads, small ears, sides with spotted and striped patterns, and almost invisible tails.

Porcupines are mammals of the family Porcupidae in the order Rodentia, belonging to the genus Porcupines. Extremely large in size. Eyes and ears are very small; The skull is thick and robust, the occipital spine is well-developed, and the nasal bone is long and wide, longer than half the length of the skull; A cavity with expansion and inflation; The nasal snout is concave and the nasal cavity is large; My whole body is covered in thorns, and the spines on my buttocks are particularly long. My tail is hidden inside the spines. The base of the spines on the forehead and front back is light brown in color, while the upper part is white; The body is dark brown with a white stripe on the neck. Porcupines mostly inhabit mountainous environments, making large-scale prevention and control difficult. They are often captured using physical equipment. Due to the increasing depletion and extinction of wild porcupines, the Chinese forestry department has listed them as a protected species and banned hunting.

Muskrat, belonging to the rodent order Cricetidae, genus Muskrat, also known as muskrat. The muskrat has a body shape similar to a large mouse, with dense fur around its body, a brown black or chestnut yellow back, and a brown gray belly. The tail is brownish black in length, slightly flattened, with scaly skin on top and sparse brownish black mixed hair. Because it lives in water and is good at swimming, it is known as a water mouse or water rat.