Common shrew

The Common shrew (Sorex vulgaris) is an insectivorous mammal belonging to the order Eulipotyphla and the family Soricidae. Unlike true rodents, shrews are carnivores that rely on a diet of insects, earthworms, and other small invertebrates, which makes them ecologically distinct from typical plant-eating garden pests.

The biology of the species is defined by a very high metabolic rate, requiring the animal to hunt constantly to survive. They do not hibernate, remaining active throughout the year. Their reproductive strategy involves multiple litters during the warmer months, allowing populations to recover quickly if the environment provides sufficient food resources.

In agriculture, the Common shrew is often mistakenly identified as a pest because of the tunnels it creates. While it does not consume roots or bulbs, its burrowing activity can disrupt the root systems of sensitive seedlings or young plants, leading to localized plant stress or even death due to the loss of soil contact in the root zone.

The damage caused is primarily mechanical rather than trophic. By tunneling through beds and nurseries, shrews loosen the soil, which can be detrimental to delicate root structures. However, farmers should weigh these costs against the significant benefits of having shrews in the garden, as they are expert hunters of agricultural pests like wireworms and larvae.

To mitigate issues with shrews without resorting to extermination, consider the following non-lethal management strategies:

• maintaining soil compaction around young vegetable patches;
• employing solar-powered sonic vibration devices;
• using wire mesh barriers buried around sensitive seedlings;
• cultivating aromatic plants like fritillaries or narcissus to act as natural deterrents.