The black tailed groundhog is a reptile in the family Muridae, belonging to the order Rodentia. The body length is about 30-40 centimeters, the shoulder height is over 10 centimeters, the body is long and fat, and the head is short and wide; The neck is thick and short, and the ears are short and small. The body hair is mainly gray brown; The abdomen is grayish yellow in color; The tail end is black. Life expectancy is 8 years. The black tailed groundhog is distributed in the grasslands of central North America, extending northward to southern Canada; Mainly living on the edge of the Sonora Desert. Social animals that do not hibernate, are active during the day, are good at digging caves, and feed on herbaceous plants. When most of the group is foraging on the grassland, there is always one standing guard near the cave.

The spotted hyena was first officially described by German naturalist Johann Christian Polikap Erxler in 1777. The ancient Greek root of the scientific name of the spotted hyena was used by Pliny the Elder to describe an unknown animal in Ethiopia, possibly the hyena. In literature, it means' object in the color of saffron '. Although spotted hyenas have some similarities to the canidae family, they are more closely related to the civet family. Spotted hyenas belong to the cat suborder, so they are closer to the feline family than to the canine family. The spotted hyena is currently the largest member of the hyena family. It is believed that the ancestor of the spotted hyena branched out from the striped hyena during the Pliocene period (5.33-18 million years ago).

Virginia deer (Odocoli virginianus), English name: Zimmermann, also known as white tailed deer, is a species of deer in the family Deer. Named after the tail curling up and the white bottom exposed when running. Body length is 1.83-1.98 meters, shoulder height is 0.92 meters, and tail length is about 10-28 centimeters; Small ears; The back branch of the horn is simple; The body gland is small, only about 3 centimeters long, and there are white hairs around the gland. Distributed in southern Canada, most of the United States, and northern South America.