Siberian shrew
Crocidura sibirica is a shrew from the kind of white tooth shrew ( Crocidura ). It occurs in central to northeast Asia from Kyrgyzstan and Kazakhstan prior to Siberia, Russia and Mongolia and in the northwest of the People 's Republic of China.
Features
With a head-body length of about 5.8 to 8.0 centimeters with a weight of 50 to 96 grams Crocidura sibirica is one of the medium-sized shrews of Eurasia. The tail reaches a length between 30 and 39 millimeters and is about 50 % of head -body length is comparatively short. The hind foot has a length of 10 to 13 millimeters. The back fur is brown-gray and slightly lighter than comparable types, the belly is white gray and sharply separated from the back. The tail is uniformly dark brown
The skull has a total length of 18 to 20 mm. Like all species of the genus has the kind in the maxilla per half an incisor ( incisor ) and then three unicuspid teeth, one premolar and three molars. In the mandible, it has, however, a single canine ( canine ) behind the incisor. Overall, the animals thus have a set of teeth from 28 teeth. The roots are not pigmented white, as in all tooth shrews in contrast to those of the Rotzahnspitzmäuse.
Dissemination
Crocidura sibirica occurs in Central and Northeast Asia from Kyrgyzstan and Kazakhstan prior to Siberia, Russia and Mongolia and in the northwest of the People 's Republic of China.
Way of life
Crocidura sibirica occurs in many habitats, the habitats of mountainous coniferous forests and meadows along rivers and streams with Auendickichten of willow, birch and aspen on dense taiga to swampy water holes and flooding meadows rich. The species is known to colonize abandoned mole tunnels. Like all shrews feed on this species of invertebrates, especially insects; Food analyzes revealed a large amount of beetles and grasshoppers. Little is known about the reproduction.
System
Crocidura sibirica is classified as a separate species within the genus of white tooth shrew ( Crocidura ), which consists of about 170 species. The first scientific description comes from Dukelsky from 1930, which described an individual from the upper reaches of the Yenisei River in Siberia, about 96 kilometers south of the Russian city of Minusinsk. Partial Crocidura sibirica was the type Crocidura leucodon assigned as the subspecies. Probably shantungensis is closely related to C. suaveolens and C..
Within the species are no more subspecies next to the nominate Crocidura sibirica sibirica is distinguished.
Threat and protection
Crocidura sibirica is classified by the International Union for Conservation of Nature and Natural Resources ( IUCN) due to the large distribution area, the large populations and the non-existent threat to the existence as not at risk ( least concern ). It is regionally considered as pest and adequately controlled.