World’s Smallest Known Mammal (by Mass) - ETRUSCAN SHREW
Also known as the Etruscan pygmy shrew or the white-toothed pygmy shrew
in the belt between 10° and 30°N latitude stretching from Europe and North Africa up to Malaysia.
Least Concern, relatively rare and are endangered in some countries.
- The Etruscan shrew has a very fast heart beating rate, up to 1511 beats/min (25 beats/second) and a relatively large heart muscle mass, 1.2% of body weight.
- Etruscan shrew have an extremely fast metabolism and have to eat 1.5–2 times their body weight in food per day. They feed up to 25 times per day
- They tend to groom themselves constantly when not eating and are always moving when awake and not hiding
- Cubs are born naked and blind, but quickly develop, becoming independent and sexually mature at 3–4 weeks of age.
- It is poorly adapted to digging burrows and therefore arranges its nests in various natural shelters, crevices and others uninhabited burrows.
- A clicking sound is heard when these shrews are moving, which ceases when they rest.
- The shrews are more active during the night when they make long trips; during the day, they stay near the nest or in a hiding place.
Fact Source: http://en.wikipedia.org/wiki/Etruscan_shrew