Snails need moisture to survive; so if the weather is not cooperating, they can actually sleep up to three years. It has been reported that depending on geography, snails can shift into hibernation (which occurs in the winter), or estivation (also known as 'summer sleep'), helping to escape warm climates.
At first glance, you may not assume that land snails live very fascinating lives. However, these gastropods live quite unique lifestyles. These animals are hermaphrodites, which means they have both male and female reproductive organs. They have no sense of hearing, and salt is potentially toxic for them. However, one of the most interesting aspects of their life is how they sleep. Exactly, how long can certain snails sleep for? You may be surprised by the answer.