What did the snail do when it climbed the concrete wall after the rain?

Sometimes after the rain, many snails climb to the concrete wall and eat the wall to supplement calcium. Snails will gather for activities after rain and on cool and humid nights. Except for places with rich vegetation, sometimes on bare concrete walls. Snails will also gather in the world. This is because rich calcium carbonate is needed to help form the shell, and the artificial cement wall can provide sufficient trace element-calcium carbonate.

Extended data:

Snails belong to invertebrates, mollusks, Gastropoda, Spirulina and snails. The shell is generally low conical, right-handed or left-handed. The head is prominent, with two pairs of antennae, and the big one 1 has eyes at the top. There is a mouth on the ventral side of the head, and there is a tooth tongue in the mouth, which can be used to scrape food.

Snails have shells, which are shaped like small snails and have various colors; There are four tentacles on the head. When you walk, your head sticks out, and when you are frightened, your head and tail retract into the carapace together. Snails have saliva, which can inhibit centipedes and scorpions. When it is hot in June and July, it will hang under the leaves and rise upwards until it dies after vomiting.

Snails have the most teeth, but their teeth are not "three-dimensional teeth". Although there are thousands of teeth, they can't chew food. This is because they digest food with their tongues, a band-shaped structure covering their teeth. During their lifetime, their small teeth will slowly wear out and be passivated, and then they will be replaced by sharper new teeth.

Snails excrete near breathing holes, which are called stomata. It will discharge feces on itself, and finally leave feces on the ground through the abdomen and mucus.