Brown-Lipped Snail (Cepaea nemoralis) lives in temperate forests across Europe and North America. It feeds on leaves and stems. Its conservation status is Least Concern.
Fascinating facts about the Brown-Lipped Snail
- The grove snail displays an extraordinary range of shell colours and banding patterns, which is why it has become a favourite model for studies of ecological genetics and citizen science projects. Its background hue can vary from brown through pink to yellow, and it may bear anywhere from zero to five dark bands, each differing in intensity and width.
- An adult grove snail's shell typically measures between 18 and 25 millimetres in width and 12 to 22 millimetres in height, comprising four and a half to five and a half whorls. The surface of the shell is semi-glossy, giving it a subtle sheen. These dimensions place it among the largest land snails in Western Europe, and the thickened, slightly out-turned apertural lip is a distinctive feature of mature individuals.
- In Britain the grove snail lays clutches of thirty to fifty oval eggs between June and August, each egg measuring about 3.1 by 2.6 millimetres and having a diameter of 2.3 to 3.0 millimetres. After an incubation period of fifteen to twenty days, the juveniles emerge and begin feeding on dead plant material.
- The song thrush is the chief predator of the grove snail, and it tends to focus its hunting on the most common shell form, creating a 'search image' that makes rarer colour morphs less likely to be eaten. This selective pressure means that uncommon shells enjoy a survival advantage, which in turn sustains the wide palette of hues and banding patterns seen in the species.
- The first recorded introductions of the grove snail to North America began in 1857, and since then it has become established across the continent, from the west coast of British Columbia to the east coast of Newfoundland. In Canada it is especially problematic in Ontario vineyards, where the snails are unintentionally collected with the grapes.
Sources
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At a glance
RangeEurope and North America
HabitatTemperate forests
DietLeaves and stems
About the Brown-Lipped Snail
In the damp, emerald undergrowth, the brown-lipped snail glides silently, its translucent foot leaving behind a glistening trail of silver as it navigates the intricate network of leaf litter and decaying wood. With a delicate, almost ethereal quality, it moves through the world, its shell a masterful blend of form and function, protecting the tender flesh within as it searches for the tender shoots and leaves that sustain it. As it pauses to feed, the snail's very existence seems a testament to the quiet, unassuming beauty of the natural world.
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