In winter, slugs seek out thermally buffered hibernation sites where temperatures rarely dip below 0°C. These are usually underground and provide protection from the worst winter frosts. Slug eggs also overwinter in large numbers, probably surviving the chill by 'supercooling' – lowering their normal freezing points.
Accordingly, do slugs die in the winter?
Slug eggs can lay dormant in the soil for years and then hatch when conditions are right. Unlike snails that hibernate during winter, slugs are active whenever the temperature is above 5°C. A slug is essentially a snail without a shell. Slugs used to live in the ocean, which is why they still need to keep moist.
Do snails live in winter?
Some snails hibernate during the winter (typically October through April in the Northern Hemisphere). They may also estivate in the summer in drought conditions. To stay moist during hibernation, a snail seals its shell opening with a dry layer of mucus called an epiphragm.