JEREMY BISHOP / SCIENCE PHOTO LIBRARY JEREMY BISHOP / SCIENCE PHOTO LIBRARY
Snail resting on a fennel stem. Snails are molluscs that protect themselves with a mineralised spiralling shell. They can secrete mucus with which to glue themselves to a support, such as a plant. This is done during daylight hours, as a means of minimizing dehydration and the chance of being eaten by a predator.
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