Mammals Active day and night

obscure white-toothed shrew

Crocidura obscurior

iNaturalist Wikipedia

The obscure white-toothed shrew is a miniature marvel of the West African rainforest. Often hidden beneath the leaf litter, this tiny hunter is a testament to the incredible biodiversity found on the forest floor.

0 Sightings

0 Habitats

Quick Identification

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Size

Length 4.5–6 cm (1.8–2.4 in), tail 3–4.5 cm (1.2–1.8 in), weight 3–5 grams (0.1–0.2 oz)

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Colors

Uniform dark chocolate brown to grayish-black upperparts, slightly lighter gray-brown underparts, flesh-colored ears.

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Key Features

Tiny, mouse-like appearance with an exceptionally long snout
Prominent ears visible above short, velvety fur
Short tail with scattered long sensory hairs (vibrissae)
Pure white teeth, lacking the iron-staining found in other shrew families

When You’ll See Them

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Activity pattern Active day and night

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Peak hours Most active during twilight and night (7 PM - 5 AM)

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Season Year-round

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Diet Strictly insectivorous; feeds on beetles, spiders, crickets, and insect larvae found in the leaf litter.

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Habitat Primary and secondary tropical moist lowland forests, dense undergrowth, and humid leaf litter layers.

public Geographic range

Where Does the obscure white-toothed shrew Live?

This species is a native specialist of the Upper Guinean forest block in West Africa. Its core range spans the lush, tropical landscapes of Ivory Coast, Ghana, Guinea, Liberia, and Sierra Leone. It is strictly tied to moist lowland environments and does not currently have any known introduced populations outside of its native African tropical belt.

Basemap © OpenStreetMap contributors

5 Countries

450K km² Range

Least Concern Conservation

Ivory Coast GH Ghana Liberia Sierra Leone Guinea

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iNaturalist / Verified observation data

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Behavior

The obscure white-toothed shrew is a high-energy insectivore that lives life in the fast lane. Due to its tiny body mass and high surface-area-to-volume ratio, it has an incredibly fast metabolism, requiring it to forage almost constantly to avoid starvation. It spends the majority of its time darting through the 'scuttle-zone'—the layer of decaying leaves and twigs on the forest floor—where it uses its sensitive whiskers and keen sense of smell to detect prey in the dark.

While primarily solitary, these shrews are known for their territorial nature despite their diminutive size. They are rarely seen by humans due to their preference for dense cover and their lightning-fast movements. When threatened or navigating, they may emit high-pitched squeaks, some of which border on ultrasonic, helping them communicate or orient themselves in the complex architecture of the forest floor.

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Camera Tips

To capture the obscure white-toothed shrew on camera, you must think small. These mammals are tiny and stay low to the ground, so place your camera at an ultra-low angle—no more than 5 to 10 centimeters off the soil. Instead of aiming across a wide clearing, point the lens along 'natural runways' like the edge of a fallen log or a tunnel through thick leaf litter where shrews feel safest from owls and snakes.

Standard PIR sensors can sometimes miss such a small heat signature. To ensure a trigger, set your camera to its highest sensitivity and use a 'Fast' or 'Instant' trigger speed setting. If your camera supports a 'Macro' mode or has a close focal range, use it; otherwise, the shrew may appear as a blurry brown speck. Using a burst mode of 3-5 photos per trigger is essential, as these animals move with jerky, rapid motions that can easily result in an empty frame if the shutter is too slow.

Luring is highly effective for this species. A small amount of pungent bait, such as wet cat food or minced meat, placed inside a small cage or under a perforated log, will encourage the shrew to linger and sniff around. This 'dwell time' is your best chance for a high-quality image. Since they are active both day and night but prefer the cover of darkness, ensure your infrared flash is functioning well for clear black-and-white night shots.

Similar Species

Species that look similar or are commonly confused with obscure white-toothed shrew.

West African Pygmy Shrew

Even smaller in size with a shorter tail relative to its body length.

African Giant Shrew

Significantly larger, often reaching 15cm or more in length, with a much more robust build.

Therese's Shrew

Shares a similar range but typically has slightly different fur texture and subtle cranial differences.

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Frequently Asked Questions

They are active both day and night because their high metabolism requires constant feeding, but they show peak activity during the night and at dawn and dusk to avoid many visual predators.

Place your camera near moist leaf litter or fallen logs and use a scent-based lure like wet cat food or mealworms to encourage them to stay in the frame.

They are insectivores that primarily eat small invertebrates like spiders, beetles, and larvae found in the soil and decaying vegetation.

No, they are primarily forest specialists and are rarely found in suburban environments unless the area is directly adjacent to primary or secondary tropical forest.

Shrews have a much longer, pointed snout and much smaller eyes compared to mice. Additionally, this species has pure white teeth, whereas mice have yellow-orange incisors.

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