Crocodiles are reptiles belonging to the Crocodylidae and Alligatoridae families, with a total of 8 genera and 23 species. Crocodiles have a longer torso; Muscular development; Crocodiles are mostly distributed in tropical regions of Africa, Asia, North and South America, and Australia, with only Yangtze alligators and American alligators living in temperate regions. Crocodiles inhabit areas such as lakes, swamps, and shallow waters. Living together in common groups; Enjoy a warm environment. Crocodiles mainly prey on vertebrates, as well as mollusks and crustaceans. Crocodiles, as one of the oldest species on Earth to date, retain many features of early dinosaur reptiles and are also known as "living fossils".

Bear is a general term for carnivorous animals in the family Ursidae. All types have a broad head; Maxillofacial protrusion; The skeleton is huge; The claws are thick, sharp and powerful; Covered with coarse hair on the body; The size varies depending on the type; Short and thick neck; The mouth and nose are pointed in shape; Short ears and small eyes. The lifespan of wild bears is about 15-20 years. Bears are more common in northern temperate regions and are widely distributed in North America, Europe, and Asia. Residing in mountainous, temperate, or tropical forests. Most of them are good at climbing trees and swimming Due to continuous hunting, the numbers around the world are decreasing. Nowadays, many countries protect it in national parks and require strict adherence to hunting regulations.

Hedgehog is a collective term for a class of small mammals in the family Hedgehog of the order Hedgehog. Because it is wrapped in a layer of pointed prickly hair, it is named, also known as hedgehog, hedgehog mouse, prickly mouse, etc. Hedgehogs are distributed in countries such as Asia, Europe, and Africa, inhabiting mountainous forests, grasslands, farmland, shrubs, and other areas. Hedgehogs lie down during the day and come out at night, enjoying snoring. As an ectothermic animal, it cannot stably regulate its body temperature and has a hibernation habit. In recent years, overfishing and indiscriminate killing have caused serious damage to the wild resources of hedgehogs, resulting in a sharp decline in their numbers. China has listed them as a scarce commodity and requires artificial breeding.

Bear is a general term for carnivorous animals in the family Ursidae. The lifespan of wild bears is about 15-20 years. Bears are more common in northern temperate regions and are widely distributed in North America, Europe, and Asia. Residing in mountainous, temperate, or tropical forests. Most of them are good at climbing trees and swimming. Poor vision, sensitive sense of smell, relying on smell to forage. Omnivorous animals. Bear meat is a delicacy in Chinese cuisine. Bear skin has been considered very precious for many years. Bear oil can be used for frying food and as a leather softener. Live bears have been used for entertainment in various historical periods. Due to continuous hunting, the numbers around the world are decreasing.

Squirrels are mammals belonging to the family Squirrels in the order Rodentia. Because squirrels look like mice and most of them like to gnaw on nuts such as pine cones, they are accustomed to living on trees, especially pine trees, hence the name. Squirrels are widely distributed in Asia, North and South America, and Europe. Squirrels are omnivorous animals that eat a variety of plants, including nuts, seeds, pine cones, fruits, fungi, and green plants, as well as insects. Squirrels have medicinal value, with a sweet and salty taste, a neutral nature, and the effects of regulating qi, regulating meridians, reducing accumulation, and relieving pain. Squirrel meat is edible and has a fragrant scent of pine nuts. Squirrels are valued for their fur and are important resource animals in the hunting industry.

Hedgehog is a collective term for a class of small mammals in the family Hedgehog of the order Hedgehog. Because it is wrapped in a layer of pointed prickly hair, it is named, also known as hedgehog, hedgehog mouse, prickly mouse, etc. Hedgehogs are distributed in countries such as Asia, Europe, and Africa, inhabiting mountainous forests, grasslands, farmland, shrubs, and other areas. Hedgehogs lie down during the day and come out at night, enjoying snoring. As an ectothermic animal, it cannot stably regulate its body temperature and has a hibernation habit. In recent years, overfishing and indiscriminate killing have caused serious damage to the wild resources of hedgehogs, resulting in a sharp decline in their numbers. China has listed them as a scarce commodity and requires artificial breeding.