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Snail - Wikipedia
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Snail Animal Facts | Achatinoidea - A-Z Animals
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Snail | mollusk | Britannica
Land snail | Habitat, Diet, Shells | Britannica
Gastropod - Shell Structure, Anatomy, Diversity | Britannica
10 Spectacular Snail Species - Treehugger
Snail Facts, Types, Diet, Reproduction, Classification, Pictures