Several mongoose species occur in Tanzania, through some are too scarce and nocturnal to be seen by casual visitors. The largest, with a shoulder height of up to 40 cm, is the white-tailed mongoose (Ichneumia albicauda); a widespread solitary nocturnal predator easliy identified by its bushy white tail. More common is the diurnal and highly sociable banded mongoose (Mungos mungo s; shoulder height: 20 cm), which is dark brown except for a dozen black stripes across its back, and occurs in family groups in most wooded habitats and savannah. The dwarf mongoose (Heligale parvula) is a diminutive (shoulder height: 7 cm) and highly sociable light-brown mongoose often seen in the vicinity of ternite mounds, particularly in Tarangire National Park. The more solitary marsh mongoose (atilax paludinocus) is large (shoulder height: 22 cm), has a scruffy-looking brown coat, and is widespread in the eastern side of Africa where it is often seen in the vicinity of water. The slender mongoose (Galerella sanguinea) is as widespread and also solitary, but it is very much smaller (shoulder height: 10 cm) and has a uniform beown coat and black tail tip.