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Xerini

life science Maturity 5-7 Next article →

Xerini is a tribe of ground squirrels found in Africa and Asia. They belong to the subfamily Xerinae. This subfamily also includes the Marmotini, known as Holarctic ground squirrels. It also includes the Protoxerini, which are African tree squirrels. These animals are terrestrial, meaning they live on the ground. They are also diurnal, so they are active during the daylight hours. Most Xerini live in burrows within open woodlands or grasslands. Some also live in rocky country.

There are five living genera within the Xerini tribe. The genus Xerus contains the unstriped ground squirrel. The genus Euxerus includes the striped ground squirrel. The genus Geosciurus contains the Cape and mountain ground squirrels. The genus Atlantoxerus includes the Barbary ground squirrel of North Africa. Finally, the genus Spermophilopsis contains the long-clawed ground squirrel of Central Asia. Scientists have also identified fossil species. These include the genus Heteroxerus and the genus Aragoxerus.

These squirrels have a very diverse diet to help them survive. They eat many different types of plant matter. This includes roots, seeds, fruits, pods, and grains. They also consume animal matter to get nutrients. They will eat insects, small vertebrates, and bird eggs. Because they live in colonies, their behavior is often compared to North American prairie dogs. While some people keep them as pets, farmers often view them as pests.

Reproduction in these squirrels follows specific biological patterns. In South African ground squirrels, breeding is asynchronous. This means there is no single specific period for breeding. However, very few litters are seen above ground from July to October. The gestation period, or the time a mother carries her young, lasts 48 days. Once born, the young ones are weaned after 52 days. A typical litter consists of only one to three babies.

Growth and maturity happen at different rates for males and females. A female becomes sexually mature at 10 months of age. A male reaches maturity at 8 months of age. Although a female can breed throughout the entire year, they rarely have many offspring. Less than 10% of females reproduce more than one litter in a single year. It is also notable that the South African ground squirrel does not hibernate.

Social structure is a very important part of Xerini life. They live in groups that usually include one to three females. These groups often have two to three males. Sometimes, the number of males can reach up to nine. In some cases, sub-adult females are also present. Mature males exhibit a unique behavior by forming their own large groups. These specific groups are called bands. A single band can contain 19 to 20 individuals.

These animals show a surprising way of sharing their environment. Different groups often share the same home range. This is unusual because most mammals compete fiercely for territory and mates. For Xerini, the benefits of group living outweigh the costs of competition. Living in large groups provides a better chance of survival against predators. This social instinct is a key part of how they thrive in their habitats.

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