Greater White-toothed Shrew (Crocidura russula) lives in mediterranean forests across Southern Europe and Africa. Its conservation status is Least Concern.
Fascinating facts about the Greater White-toothed Shrew
- The greater white-toothed shrew, the most common of its kind, was first noted in England in 2021 after a cat named Jeff spotted it, confirming the species' arrival on the island. Its earlier discovery in Ireland came in April 2008, extending its known western range. The shrew's overall distribution already includes the Mediterranean basin, the Netherlands, Belgium, Germany and Portugal, showing it is well-established across much of Europe and North Africa.
- Greater white-toothed shrews form long-term monogamous pair bonds, with both members defending a shared territory. Unusually for mammals, females are the ones that leave to establish new home ranges, a pattern described as female-biased dispersal.
- The species is notably vocal, producing a high-pitched twittering call that functions as a primitive echolocation system, allowing it to interpret its surroundings. This laryngeal call works together with its whiskers, enabling the shrew to navigate through dense vegetation and leaf litter where it often forages for insects. Such sensory adaptations help it locate prey and avoid predators while moving under cover of grassland and woodland habitats.
- The greater white-toothed shrew reproduces only once in its life, with fertilisation taking place immediately after the newborns are delivered. This single breeding window runs from March to September, during which the female can produce roughly four litters. Each litter may hold between two and ten young, and the offspring remain in the parental territory until the next breeding period, ensuring all reproductive output is confined to that one season.
- In natural conditions a greater white-toothed shrew lives for about eighteen months, a short span that reflects the pressures of predation and resource availability. When kept under laboratory care, the same species can reach up to thirty months, showing how protection from threats and steady food supply extend its longevity. This contrast highlights the species' vulnerability in the wild compared with the stability provided by captivity.
Sources
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At a glance
RangeSouthern Europe and Africa
HabitatMediterranean forests
DietInsects and worms
About the Greater White-toothed Shrew
In the warm, golden light of a Mediterranean dusk, the Greater White-toothed Shrew darts through the underbrush, its tiny, velvety form a blur of frenetic energy as it pursues its insect prey with unyielding ferocity. With each fleeting step, its delicate, almost translucent legs seem to barely touch the earth, as if the very ground itself is an afterthought in the shrew's relentless quest for sustenance. As it vanishes into the shadows, its high-pitched, squeaking calls pierce the evening air, a testament to the unbridled vitality of this diminutive, yet formidable, creature.
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