It is a subspecies of gray wolf, belonging to the upper predator in the food chain, usually acting in groups. Living in the forests, mountains, cold grasslands, coniferous forests, and grasslands at the southeastern end of Alaska, it is the smallest wolf among all wolves in North America. Has good endurance and is suitable for long-distance migration. Narrow chest, strong and powerful back and legs, giving them efficient mobility. It can walk more than ten kilometers at a speed of about 10 kilometers per hour, increase its speed to nearly 65 kilometers per hour when chasing prey, and cover a distance of up to 5 meters per step during sprinting. Due to their ability to prey on livestock such as sheep, they were extensively hunted and killed by humans until the late 20th century.

It is a carnivorous dinosaur that lived in the early Jurassic period, approximately 200 million years ago. Fossils were first discovered in Arizona, United States. Shuangjilong is known for its unique head features, which include a pair of distinct bony processes on the top of the head that may have been used for display or as communication tools. The body length is about 6 to 7 meters and the weight can reach half a ton. It is a fast and agile predator that feeds on small dinosaurs and other animals. Strong jaw, sharp teeth, suitable for tearing prey. It is depicted in popular culture as being able to spray venom, but this feature has not been confirmed in fossil records.

The terror pig, also known as the terror pig, has a slightly larger body size than the giant pig and the complete toothed pig, and is an extremely large species in the giant pig family. Between 5 and 23 million years ago, the terror pig was the largest member of the Auchenipteridae family in history. It had huge tusks and jawbones, was an omnivorous species, and had a body size similar to that of a rhinoceros. It was more ferocious than modern wild boars and was named after its previous name, Dinohyus, which means "terror pig" in Greek. Their living habits are similar to those of ancient giant pigs and porcupines. The staple food of the terror pig is plants, but it also often eats decay or attacks small animals, as well as snatching food from small carnivores.

Allosaurus is one of the most famous large carnivorous dinosaurs, occupying the top of the food chain in late Jurassic terrestrial ecosystems. Its model species, the fragile Allosaurus, was created by the great American paleontologist Osnil in the 20th century Marsh described the naming in 1877. They are also the most abundant and widely distributed predators discovered in the Late Jurassic period. Adult Allosaurus can grow up to 9 meters in length, with a few individuals believed to reach up to 12 meters. Although not as robust as the Tyrannosaurus rex, the body proportions of the Allosaurus are more symmetrical, with more developed forelimbs, making it appear more agile. The number of specimens is also much larger than that of Tyrannosaurus rex.