European tarantula is a species of tarantulae, widely distributed in Europe. It usually has a gray-brown body color, a strong and spiny body, stout feet, and three claws at the end. The eyes are arranged in three columns, the vision is sharp, mainly rely on visual hunting. Good at running and jumping, quick action, fierce temperament. Mostly in the ground activities, common in the grass, ridges, streams, ditch, mountains and grasslands and other environments. It is usually active at night and hidden under stones or in earth crevices during the day. A large amount of predation is an important natural enemy of pests in farmland. The egg bag is spherical or oblate, and the mother spider will carry the egg bag in the abdomen until the young spider hatches.

Wolf spider is a general term for the family of wolf spiders in the order of arachniformes. Due to its excellent hunting skills, agile movements, large predation, and fierce nature, it is named Wolf Spider. Currently, there are 2400 species belonging to 123 genera in the wolf spider family, distributed worldwide. China is known to have 26 genera and 310 species. Mostly active on the surface and edges of rice paddies or other fields. Gluttony, large predation, diverse diet. Spider venom is usually colorless, bitter in taste, and has an alkaline reaction. It is soluble in water but insoluble in alcohol and ether. In history, in 1952, the United States used a species of wolf spider in the family Colubridae to make bacterial weapons. At present, the wolf spider family has been included in the list of spiders in China's Jiuzhaigou Valley Scenic and Historic Interest Area Nature Reserve.