Snails can climb trees, but they usually can only crawl on the smooth surface of trees, because they don't have strong feet and grip like insects or lizards. Snails use mucus, gastropods and other attached substances under their bodies to crawl on the tree surface gradually. Mucus can help snails adhere to the surface of trees, while gastropods can provide propulsion.

In addition, snails can use their shells to provide protection and support. The spiral structure of the shell can provide stable support for snails and protect them from the external environment.

In short, snails can climb trees with the support of body adhesion substances and shells. Although they don't usually live in trees, in some cases, such as looking for food or avoiding danger, they will use this ability to carry out activities in trees.