The common slender mongoose (Herpestes sanguineus), also known as the black-tipped mongoose or the black-tailed mongoose, is a very common mongoose species native to sub-Saharan Africa.
As the name suggests, the common slender mongoose has a lithe body of 27.5–40 cm (10.8–15.7 in) and a long tail of 23–33 cm (9.1–13.0 in). Males weigh 640–715 g (22.6–25.2 oz), while the smaller females weigh 460–575 g (16.2–20.3 oz).
The color of their fur varies widely between subspecies, from a dark reddish-brown to an orange red, grey, or even golden yellow, but these mongooses can be distinguished from other mongooses due to the prominent black or red tip on their tails. They also have silkier fur than the other African members of their family.
The common slender mongoose occurs throughout sub-Saharan Africa, where it is most common in the savannah and semiarid plains, but rarely recorded in densely forested areas and deserts.
The common slender mongoose generally lives either alone or in pairs. It is primarily diurnal, although it is sometimes active on warm, moonlit nights. It doesn't seem to be territorial, but will nevertheless maintain stable home ranges that are often shared with members of related species. Indeed, the common slender mongoose and these other species may even den together, as most of their relatives are nocturnal. Dens may be found anywhere sheltered from the elements: in crevices between rocks, in hollow logs, and the like.
A male's range includes the ranges of several females, and scent cues inform him when the female is in heat. The gestation period is believed to be 60 to 70 days, and most pregnancies result in one to three young. The male does not help care for them. Unusually, for a solitary species, in the Kalahari Desert the males are philopatric whereas the females disperse.
The common slender mongoose is primarily carnivorous, though it is an opportunistic omnivore. Insects make up the bulk of its diet, but lizards, rodents, snakes, birds, amphibians, and the occasional fruit are eaten when available. It will also eat carrion and eggs. As befits the popular image of mongooses, the slender mongoose is capable of killing and subsequently eating venomous snakes, but such snakes do not constitute a significant portion of its diet.
Common slender mongooses are more adept at climbing trees than other mongooses, often hunting birds there. White browed-sparrow weavers, crimson breasted shrikes, and glossy starlings are considered common prey.
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