Mammals crepuscular

Common Shrew

Sorex araneus

A tiny, velvet-furred dynamo with a relentless appetite. The Common Shrew is the hidden engine of the garden undergrowth, living a high-speed life of constant foraging and territorial defense.

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Quick Identification

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Size

Body length of 55–82 mm (2.2–3.2 in) with a 32–52 mm (1.2–2 in) tail; weight ranges from 5–12 g (0.2–0.4 oz).

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Colors

Distinctive tricolored fur: a dark chocolate brown back, lighter brownish-tan flanks, and a pale grayish-white belly.

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Key Features

Extremely long, twitching, pointed snout
Velvety tricolored fur with dark back and pale underside
Small, black beady eyes and ears nearly hidden by fur
Distinctive red-tipped teeth caused by iron deposits

When You’ll See Them

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Activity pattern crepuscular

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Peak hours Active in 2-3 hour cycles throughout the day and night, with peak activity often at dawn and dusk.

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Season Year-round, with a population peak in mid-to-late summer when juveniles emerge.

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Diet Primarily insectivorous, they hunt earthworms, beetles, spiders, woodlice, and slugs. Their foraging strategy involves rapid-fire sniffing and probing through soil and leaf litter.

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Habitat Widespread across suburban gardens, hedgerows, deciduous woodlands, and lush grasslands with plenty of ground cover.

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Behavior

Common Shrews are solitary and fiercely territorial creatures that live life at an incredible pace. Due to a hyperactive metabolism, they must eat every two to three hours to survive, often consuming their own body weight in food each day. This relentless drive makes them active around the clock, though they are rarely seen as they stick to the cover of leaf litter and underground tunnels.

While they have very poor eyesight, they navigate their complex world using a keen sense of smell and a primitive form of echolocation. They are surprisingly vocal for their size; if you sit quietly near a hedgerow, you may hear their high-pitched, metallic squeaks as they defend their territory or forage for prey. They are one of the few venomous mammals, using specialized saliva to paralyze larger prey like earthworms.

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Camera Tips

To capture the Common Shrew, your camera placement must be literal 'ground level.' These mammals rarely climb and spend their lives inches from the soil. Position your camera as low as possible, ideally parallel to the ground. Look for 'shrew runs'—tiny, flattened paths through long grass or the narrow gaps between garden stones and logs. Aiming the camera along a garden wall or the edge of a compost heap is often the most successful strategy.

Because shrews are so small and fast, standard trail camera settings often result in 'ghost' images or empty frames. Set your camera to its highest PIR (Passive Infrared) sensitivity to ensure it detects their small heat signature. Use a 'Burst' or 'Rapid Fire' photo mode, capturing 3-5 photos per trigger. This increases your chances of getting a clear shot of their face rather than just a disappearing tail.

Luring a shrew is remarkably effective because they are always hungry. A small pile of dried mealworms or a teaspoon of wet cat food placed 3-4 feet in front of the lens will pause them long enough for a clear image. If your camera has a 'Macro' setting or a focus-adjustment ring, use it; otherwise, ensure the bait is far enough away to avoid a blurry close-up, as most fixed-focus trail cams struggle with objects closer than three feet.

In the winter months, focus your efforts on compost heaps or thick piles of leaf litter. These areas stay slightly warmer and house the insects shrews rely on during the cold. Since they don't hibernate, winter is actually a fantastic time to record them, as the lack of dense summer vegetation makes them much easier to spot on camera. Avoid using high-intensity white flash at night as it can wash out their velvety fur; infrared (IR) or 'no-glow' LEDs are far superior for capturing their subtle tricolor markings.

Similar Species

Species that look similar or are commonly confused with Common Shrew.

Pygmy Shrew

Much smaller than the common shrew with a proportionately longer, thicker, and hairier tail.

Water Shrew

Larger with black fur on top and white underneath, featuring a fringe of stiff hairs on the feet for swimming.

Frequently Asked Questions

Common Shrew are polyphasic, meaning they are active day and night in short bursts. They typically forage for 2-3 hours and then sleep for a similar period, repeating this cycle around the clock to fuel their high metabolism.

The best way to attract Common Shrew is to provide natural cover. Leave a corner of your garden wild with long grass, log piles, and leaf litter. Providing a steady food source like a compost heap or offering dried mealworms can also encourage them to visit your camera station.

They are voracious predators of invertebrates. Their diet consists mostly of earthworms, beetles, spiders, slugs, and snails. They are also known to eat small frogs or even other small mammals if the opportunity arises.

Yes, they are one of the most widespread mammals in Northern Europe and are very common in suburban gardens, provided there is enough ground cover and vegetation to hide from predators like owls and cats.

Common Shrew have a much longer, more pointed snout that is constantly twitching, and their eyes and ears are significantly smaller than those of a mouse. Their fur is velvety and they have a much shorter tail relative to their body size.

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