They come from tiny eggs of which 100 are usually laid. Common snails bury these in soil to keep them safe from predators. Egg sizes differ between species, from a 3 mm diameter in the grove snail to a 6 mm diameter in the Giant African Land Snail. After 2 to 4 weeks of favorable weather, these eggs hatch and the young emerge. Snails may lay eggs as often as once a month
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