Snails and slugs are useful! They are an important part of the ecosystem. <3

“Land snails serve an important role in the ecosystem. They eat very low on the food web, as most land snails will consume rotting vegetation like moist leaf litter, and also fungi and sometimes eat soil directly. The land snail relies on a diet rich in calcium and other nutrients to support the growth and repair of its shell as well as its overall health.

Snails then in turn are consumed by a variety of predators that rely on snails for their calcium and other dietary needs. A great diversity of animal life feeds upon land snails, from insects to lizards and snakes, salamanders, birds and mammals. Some species of fireflies consume snails exclusively during their larval stage.”

http://www.thesnailwrangler.com/education/snails-in-ecosystem/