The distribution of plants and animals has been influenced by such factors as relief and soil types and, perhaps more important, by farming methods and civil strife. Remnants of the extensive original forest cover survive in the Gola Forest Reserves, in the southeastern hill country near the Liberian border. Secondary forest is now dominant; valuable timber species including African mahogany and African teak, once common in the original forests, are now rare. The secondary forest consists of other tree species such as the fire-resistant palm tree, a valuable source of palm oil and kernels.

The prevalence of savanna vegetation increases to the north as precipitation decreases. The savannas owe their present extent and character largely to the erosion produced by farming, grazing, and the use of fire. There are some small areas of climax savanna—a closed area of broad-leaved, low-growing trees and tall tussocky grasses. Other savannas are derived from forest and are characterized by fire-resistant savanna trees with tall grasses. Tracts of tallgrass savanna also occur. Remnants of mangrove swamps constitute the main coastal vegetation community, especially in the saline tidal areas of river estuaries. Piassava, a kind of raffia palm, is common in the swampy grasslands of the south.

Unrestricted hunting during Sierra Leone’s civil war (1991–2002) adversely affected much of the country’s wildlife. Large game animals, such as elephants, leopards, lions, hyenas, and buffalo, are rarely seen outside of national parks or reserves. Chimpanzees and various species of monkeys are common in the forest zones, while other animals, such as antelope and bushpigs, are more generally distributed. There is a wide variety of insects, including the malaria-carrying mosquito and the tsetse fly. Hippopotamuses, crocodiles, and manatees occupy the rivers, including such rare species as the pygmy hippopotamus and the dwarf crocodile. The coastal waters, estuaries, and rivers, such as the Sierra Leone and the Sherbro, contain a wide variety of fish and shellfish, such as tuna, barracuda, bonga (shad), snapper, herring, mackerel, and lobster. Sierra Leone’s rich birdlife, which emerged relatively unscathed from the years of conflict, includes emerald cuckoos, owls, little African swift, vultures, and many other species. Several parks, sanctuaries, and reserves have been established to protect Sierra Leone’s wildlife, including Tiwai Island Wildlife Sanctuary and the Gola Forest Reserves in the south and Outamba-Kilimi National Park in the north. Tacugama Chimpanzee Sanctuary, located near Freetown, was established to rescue and rehabilitate abandoned or orphaned chimpanzees.

Ethnic groups

There are about 18 ethnic groups that exhibit similar cultural features, such as secret societies, chieftaincy, patrilineal descent, and farming methods. The Mende, found in the east and south, and the Temne, found in the centre and northwest, form the two largest groups. Other major groups include the Limba, Kuranko, Susu, Yalunka, and Loko in the north; the Kono and Kisi in the east; and the Sherbro in the southwest. Minor groups include the coastal Bullom, Vai, and Krim and the Fulani and Malinke, who are immigrants from Guinea concentrated in the north and east. The Creoles—descendants of liberated blacks who colonized the coast from the late 18th to the mid-19th century—are found mainly in and around Freetown. Throughout the 19th century, blacks from the United States and West Indies also settled in Sierra Leone. Ethnic complexity is further enhanced by the presence of Lebanese and Indian traders in urban centres.

Languages

Krio, a language derived from English and a variety of African languages, is the mother tongue of the Creoles and the country’s lingua franca. Among the Niger-Congo languages, the Mande group is the largest and includes Mende, Kuranko, Kono, Yalunka, Susu, and Vai. The Mel group consists of Temne, Krim, Kisi, Bullom, Sherbro, and Limba. English, the official language, is used in administration, education, and commerce. Arabic is used among Lebanese traders and adherents of Islam. School texts, information bulletins, and collections of folktales are produced in indigenous languages such as Mende and Temne.

The Vai script used in Liberia and Sierra Leone has the distinction of being one of the few indigenous scripts in Africa. Some of the local languages are written in European script, and a few, especially in the Muslim areas in the north, have been transcribed into Arabic.

Religion

About two-thirds of the population are Muslims, while about one-fourth are Christians. Less than one-tenth of the population practice a variety of traditional religions. However, this number does not include the many Sierra Leoneans who practice traditional religions in tandem with their professed Muslim or Christian faiths. Other religions—including Bahāʾī, Hinduism, and Judaism—are practiced by small percentages of the population.

Settlement patterns

Villages of about 35 buildings and 200 inhabitants dominate the rural landscape. Modernization is slowly altering the traditional pattern of rural settlement; the old circular village form, with a tight cluster of houses, is rapidly yielding to the linear village along a road or the regular gridiron pattern with adequate spacing between houses. Although disrupted by the country’s civil war, economic activity in these villages centres largely around rice farming. The extended family provides farm labour for both rice farming and cash crop production. Fishing is becoming increasingly important. The raising and herding of cattle is largely confined to the north. The small shopkeeper is typical of the villages, as are the tailor and carpenter. Traditional crafts, such as metalworking, cloth dyeing and weaving, and woodworking, are rapidly disappearing with the increased importation of cheap manufactured goods.

Except for Freetown, the development of large towns occurred only after World War II. A prominent feature of the towns is the daily market, which contains petty traders, the majority of whom are women. Bo, in the southeast, was an early administrative and educational centre. Other important towns include Kenema, east of Bo, which has grown as a result of diamond mining, and Makeni, a major commercial centre, in the north. Mining of diamonds has also been important to Koidu, Sefadu, Yengema, and Jaiama in the east. Port Loko, Kabala, Bonthe, Moyamba, Kailahun, Kambia, Pujehun, and Magburaka are administrative centres with retail trading and produce marketing. Many towns were damaged or destroyed in the civil war.

Agriculture, forestry, and fishing

Shifting agriculture, a system of cultivation that employs plot rotation in an effort to preserve soil fertility, is the technique largely practiced in Sierra Leone. More than three-fifths of the population engage in agricultural production, primarily for the domestic market but some also for export. Rice, the main food crop, is widely cultivated on swampland and upland farms. Swamp rice cultivation is concentrated in the lower reaches of river basins, of which the Scarcies is the most important. Efforts are being made to reduce upland rice farming, with its attendant soil erosion, in favour of swampland farming, with its superior yields. Other food crops include millet, peanuts (groundnuts), cassava (manioc), sweet potatoes, and oil palms. Vegetable gardening is important around the major urban centres, where markets are available to farmers. The major cash crops are palm kernels, cocoa, coffee, piassava, and ginger, and production is carried out entirely by small-scale farmers. In the 1970s the government attempted to improve agricultural productivity by creating development projects funded by the World Bank. Various other multilateral and bilateral aid projects along similar lines followed in the 1980s with varying success. Agricultural production declined drastically during the civil war.

Forest covers more than one-third of the country, the most important area of which is the Gola Forest Reserves, a tract of primary tropical rainforest near the Liberian border. Timber is produced for the domestic and export markets and includes Guarea cedrata, a cedar-scented, pink, mahogany-type wood, and the Lophira alata variety procera.

Sierra Leone’s many waterways are the home of many varieties of fish, such as bonga (a type of shad), butterfish, snapper, and sole. The coastal waters contain such shellfish as shrimp, lobster, and oysters. The country should be an ideal place for commercial fishing, but illegal activity by foreign fisheries and the years of civil war severely affected this sector. After the end of the civil war, the sector began to show gradual improvement.