Maybe snake venom?

After the snake passed the hibernation period and the twenty-four solar terms, all the hibernating animals woke up and began to come out of the hole.

At this time, the number of snakes will increase and the toxicity will become stronger and stronger.

Snake (scientific name: Serpenthes) is an animal under Chordata and Reptiles. The body is slender and divided into three parts: head, trunk and tail. There are no limbs or claw-like hind limbs on both sides of the transverse fissure of the lower snake. Full of scales; The head has different shapes, and the nostril is located on the snout side, but the Hydraceae species that live in the sea for life are located on the snout back; There is protective transparent skin outside the eyeball, the pupil is round, vertical oval or horizontal oval, there is no movable eyelid, and the crystal is almost spherical; The tongue is slender and forked; The premolars (only snakes in the family Serpentidae have teeth), maxilla, palatine bone, pterygoid bone and dentate bone of snakes are attached with teeth with curved tips, but the size, number and structure of teeth vary with different snake species. The tail is obviously shorter than the head.

The habitat of snakes varies from species to species. Some live in caves, some live on the ground, some live in trees and some live in water. The snake is a kind of temperature-changing animal whose body temperature changes with the temperature, because the snake itself has no perfect temperature regulation mechanism to generate and maintain a constant body temperature. Snakes are carnivores and eat many kinds of animals, from invertebrates to all kinds of vertebrates. Distributed in all parts of the earth except the north and south poles.

Snakes are a special biological group formed by long-term evolution of 654.38+0.3 billion years, which plays an important role in maintaining ecological balance. Snakes belong to a kind of temperature-changing animals, with a low degree of evolution, and their distribution and survival are greatly affected by climate, so they are a fragile biological group.

According to the collection of rare database, there are 3,425 species of snakes in the world, and there are 24 1 species in China. According to Zhao's Snakes in China, there are 205 kinds of snakes in China. With the deepening of field investigation, new species and new records of snakes in China are increasing.