The Etruscan shrew (Suncus etruscus), also known as the Etruscan pygmy shrew, white-toothed pygmy shrew and Savi's pygmy shrew, is the smallest known extant mammal by mass, weighing only about on average - as much as a paperclip. The body mass varies between and The ears are relatively large and protuberant. They protect their territories by making chirping noises and signs of aggressiveness. They tend to groom themselves constantly when not eating, and are always moving when awake and not hiding. The hiding periods are short, and typically last less than half an hour. Clicking sounds are heard when these shrews are moving, which cease when they rest.
Etruscan shrews mate primarily from March to October, though they can be pregnant at any time of the year. Pairs usually form in the spring and may tolerate each other and their young for some time at the nest. The gestation period is 27–28 days, and they have 2–6 cubs per litter. with each cub biting the tail of the one in front. The young Etruscan shrews are weaned at 20 days old. By three to four weeks of age, the young are independent and are soon sexually mature. and the Canary Islands.
Overall the species is widespread and not threatened, but its density is generally lower than of the other shrews living in the area.