Tanzania in the context of Tsavorite

The Nile (also known as the Nile River or River Nile) is an important river in Africa that flows northwards into the Mediterranean Sea. At roughly 6,650 km (4,130 mi) long, it is among the longest rivers in the world. Its drainage basin covers eleven countries: the Democratic Republic of the Congo, Tanzania, Burundi, Rwanda, Uganda, Kenya, Ethiopia, Eritrea, South Sudan, Sudan, and Egypt. It plays an important economic role in the economy of these nations, and it is the primary water source for South Sudan, Sudan and Egypt.

The Nile has two major tributaries: the White Nile and the Blue Nile. The White Nile, being the longer, is traditionally considered to be the headwaters, while the Blue Nile actually contributes 80% of the water and silt below the confluence of the two. The White Nile begins at Lake Victoria and flows through Uganda and South Sudan, while the Blue Nile begins at Lake Tana in Ethiopia and flows into Sudan from the southeast. The two rivers meet at the Sudanese capital of Khartoum.

Mount Kilimanjaro (/ˌkɪlɪmənˈdʒɑːroʊ/) is a large dormant volcano in Tanzania. It is the highest mountain in Africa and the highest free-standing mountain above sea level in the world, at 5,895 m (19,341 ft) above sea level and 4,900 m (16,100 ft) above its plateau base. It is also the highest volcano in the Eastern Hemisphere and the fourth most prominent peak on Earth.

Kilimanjaro's southern and eastern slopes served as the home of the Chagga Kingdoms until their abolition in 1963 by Julius Nyerere. The origin and meaning of the name Kilimanjaro is unknown, but may mean "mountain of greatness" or "unclimbable". Although described in classical sources, German missionary Johannes Rebmann is credited as the first European to report the mountain's existence, in 1848. After several European attempts, Hans Meyer reached Kilimanjaro's highest summit in 1889.

Lake Tanganyika (/ˌtæŋɡənˈjiːkə, -ɡæn-/ TANG-gən-YEE-kə, -⁠gan-; Kirundi: Ikiyaga ca Tanganyika) is an African Great Lake. It is the world's second-largest freshwater lake by volume and the second deepest, in both cases after Lake Baikal in Siberia. It is the world's longest freshwater lake. It is also the 6th largest lake by area. The lake is shared among four countries—Tanzania, the Democratic Republic of the Congo (the DRC), Burundi, and Zambia—with Tanzania (46%) and the DRC (40%) possessing the majority of the lake. It drains via the Lukuga River into the Congo River system, which ultimately discharges at Banana, Democratic Republic of the Congo into the Atlantic Ocean.

The East African Community (EAC) is an intergovernmental organisation in East Africa. The EAC's membership consists of eight states: Democratic Republic of the Congo, the Federal Republic of Somalia, the Republics of Burundi, Kenya, Rwanda, South Sudan, Uganda, and Tanzania. William Ruto, the president of Kenya, is the current EAC chairman. The organisation was founded in 1967, collapsed in 1977, and was revived on 7 July 2000. The main objective of the EAC is to foster regional economic integration.

In 2008, after negotiations with the Southern African Development Community (SADC) and the Common Market for Eastern and Southern Africa (COMESA), the EAC agreed to an expanded free trade area including the member states of all three organisations. The EAC is an integral part of the African Economic Community.

The African Pygmies (or Congo Pygmies, variously also Central African foragers, African rainforest hunter-gatherers (RHG) or Forest People of Central Africa) are a group of ethnicities native to Central Africa, mostly the Congo Basin, traditionally subsisting on a forager and hunter-gatherer lifestyle. They are divided into three roughly geographic groups:

• The western Bambenga, or Mbenga (Cameroon, Gabon, Republic of the Congo, Central African Republic),
• the eastern Bambuti, or Mbuti, of the Congo basin (DRC)
• the central and southern Batwa, or Twa (Rwanda, Burundi, DRC, Tanzania, Uganda, Zambia, Angola and Namibia). The more widely scattered (and more variable in physiology and lifestyle) Southern Twa are also grouped under the term Pygmoid.

They are notable for, and named for, their short stature (described as "pygmyism" in anthropological literature). They are assumed to be descended from the original Middle Stone Age expansion of anatomically modern humans to Central Africa, albeit substantially affected by later migrations from West Africa, from their first appearance in the historical record in the 19th century limited to a comparatively small area within Central Africa, greatly decimated by the prehistoric Bantu expansion, and to the present time widely affected by enslavement at the hands of neighboring Bantu, Ubangian and Central Sudanic groups.

Malawi, officially the Republic of Malawi, is a landlocked country in Southeastern Africa. It is bordered by Zambia to the west, Tanzania to the north and northeast, and Mozambique to the east, south, and southwest. Malawi spans over 118,484 km (45,747 sq mi) and has an estimated population of 22,224,282 (as of July 2025). Lilongwe is its capital and largest city, while the next three largest cities are Blantyre, Mzuzu, and Zomba, the former capital.

The part of Africa known as Malawi was settled around the 10th century by the Akafula, also known as the Abathwa. Later, the Bantu groups came and drove out the Akafula and formed various kingdoms such as the Maravi and Nkhamanga kingdoms, among others that flourished from the 16th century. In 1891, the area was colonised by the British as the British Central African Protectorate, being renamed Nyasaland in 1907. In 1964, Nyasaland became an independent country as a Commonwealth realm under Prime Minister Hastings Banda, and was renamed Malawi. Two years later, Banda became president by converting the country into a one-party presidential republic. Banda was declared president for life in 1971. Independence was characterized by Banda's highly repressive dictatorship. After the introduction of a multiparty system in 1993, Banda lost the 1994 general election. Today, Malawi has a democratic, multi-party republic headed by an elected president. According to the 2024 V-Dem Democracy indices, Malawi is ranked 74th electoral democracy worldwide and 11th electoral democracy in Africa. The country maintains positive diplomatic relations with most countries, and participates in several international organisations, including the United Nations, the Commonwealth of Nations, the Southern African Development Community (SADC), the Common Market for Eastern and Southern Africa (COMESA), and the African Union (AU).

The Democratic Republic of the Congo (DRC), also known as the DR Congo, Congo-Kinshasa, or simply the Congo, or more infrequently Zaire (its official name from 1971 to 1997), is a country in Central Africa. By land area, it is the second-largest country in Africa and the 11th-largest in the world. With a population of around 112 million, the DR Congo is the fourth-most populous in Africa and the most populous nominally Francophone country in the world. French is the official and most widely spoken language, though there are over 200 indigenous languages. The national capital and largest city is Kinshasa, which is also the economic center. The country is bordered by the Republic of the Congo, the Cabinda exclave of Angola, and the South Atlantic Ocean to the west; the Central African Republic and South Sudan to the north; Uganda, Rwanda, Burundi, and Tanzania (across Lake Tanganyika) to the east; and Zambia and Angola to the south. Centered on the Congo Basin, most of the country's terrain is covered by dense rainforests and is crossed by many rivers, while the east and southeast are mountainous.

The territory of the Congo was first inhabited by Central African foragers around 90,000 years ago and was settled in the Bantu expansion about 2,000 to 3,000 years ago. In the west, the Kingdom of Kongo ruled around the mouth of the Congo River from the 14th to the 19th century. In the center and east, the empires of Mwene Muji, Luba, and Lunda ruled between the 15th and 19th centuries. These kingdoms were broken up by Europeans during the colonization of the Congo Basin. King Leopold II of Belgium acquired rights to the Congo territory in 1885 and called it the Congo Free State. In 1908, Leopold ceded the territory after international pressure in response to widespread atrocities, and it became a Belgian colony. Congo achieved independence from Belgium in 1960 and was immediately confronted by a series of secessionist movements, the assassination of Prime Minister Patrice Lumumba, and the seizure of power by Mobutu Sese Seko in 1965. Mobutu renamed the country Zaire in 1971 and imposed a personalist dictatorship.

Burundi, officially the Republic of Burundi, is a landlocked country in East Africa. It is located in the Great Rift Valley at the junction between the African Great Lakes region and Southeast Africa, with a population of over 14 million people. It is bordered by Rwanda to the north, Tanzania to the east and southeast, and the Democratic Republic of the Congo to the west; Lake Tanganyika lies along its southwestern border. The political capital city is Gitega and the economic capital and largest city is Bujumbura.

The Twa, Hutu and Tutsi peoples have lived in Burundi for at least 500 years. For more than 200 of those years, Burundi was an independent kingdom. In 1885, it became part of the German colony of German East Africa. After the First World War and Germany's defeat, the League of Nations mandated the territories of Burundi and neighboring Rwanda to Belgium in a combined territory called Rwanda-Urundi. After the Second World War, this transformed into a United Nations Trust Territory. Burundi gained independence in 1962 and initially retained the monarchy. However, a coup d'état in 1966 replaced the monarchy with a one-party republic, and for the next 27 years, Burundi was ruled by a series of ethnic Tutsi dictators and notably experienced a genocide of its Hutu population in 1972. In July 1993, Melchior Ndadaye became Burundi's first Hutu president following the country's first multi-party presidential election. His assassination three months later during a coup attempt provoked the 12-year Burundian Civil War. In 2000, the Arusha Agreement was adopted, which was largely integrated in a new constitution in 2005. Since the 2005 post-war elections, the country's dominant party has been the Hutu-led National Council for the Defense of Democracy – Forces for the Defense of Democracy (CNDD–FDD), widely accused of authoritarian governance and perpetuating the country's poor human rights record.

Rwanda, officially the Republic of Rwanda, is a landlocked country in East Africa. Known as the "Land of a Thousand Hills" for its high elevation and rolling terrain, its geography is dominated by mountains in the west and savanna in the southeast. The largest and most notable lakes are mainly in the western and northern regions of the country, and several volcanoes that form part of the Virunga volcanic chain are primarily in the northwest. The climate is considered tropical highland, with two rainy seasons and two dry seasons each year. Its capital and largest city is Kigali, located at the centre of the country, at 1,567 metres above sea level.

Rwanda lies a few degrees south of the Equator in the Great Rift Valley of East Africa, where the African Great Lakes and Southeast Africa converge. Going clockwise Rwanda is bordered by Uganda to the north, Tanzania to the east, Burundi to the south, and the Democratic Republic of the Congo to the west.

Uganda, officially the Republic of Uganda, is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the Democratic Republic of the Congo, to the south-west by Rwanda, and to the south by Tanzania. The southern part includes a substantial portion of Lake Victoria, shared with Kenya and Tanzania. Uganda is in the African Great Lakes region, lies within the Nile basin, and has a varied equatorial climate. As of 2024 it had a population of 49.3 million, of whom 8.5 million lived in the capital and largest city, Kampala.

Uganda is named after the Buganda kingdom, which encompasses a large portion of the south, including Kampala, and whose language Luganda is widely spoken; the official language is English. The region was populated by people of various ethnicities before Bantu and Nilotic groups arrived around 3,000 years ago. These new inhabitants established influential kingdoms such as the Empire of Kitara. The arrival of Arab traders in the 1830s and British explorers in the late 19th century marked the beginning of foreign influence. The British established the Protectorate of Uganda in 1894, setting the stage for future political dynamics. Uganda gained independence in 1962, with Milton Obote as the first prime minister. The 1966 Mengo Crisis marked a significant conflict with the Buganda kingdom, as well as the country's conversion from a parliamentary system to a presidential system. Idi Amin's military coup in 1971 led to a brutal regime characterised by mass killings and economic decline, until his overthrow in 1979.

Kenya, officially the Republic of Kenya, is a country located in East Africa. With an estimated population of more than 53.3 million as of mid-2025, Kenya is the 27th-most-populous country in the world and the 7th most populous in Africa. Kenya's capital and largest city is Nairobi. The second-largest and oldest city is Mombasa, a major port city located on Mombasa Island. Other major cities within the country include Kisumu, Nakuru and Eldoret. Going clockwise Kenya is bordered by South Sudan to the northwest (though much of that border includes the disputed Ilemi Triangle), Ethiopia to the north, Somalia to the east, the Indian Ocean to the southeast, Tanzania to the southwest, and Lake Victoria and Uganda to the west.

Kenya's geography, climate and population vary widely. In western rift valley counties, the landscape includes cold, snow-capped mountaintops (such as Batian, Nelion, and Point Lenana on Mount Kenya) with vast surrounding forests, wildlife, and fertile agricultural regions in temperate climates. In other areas, there are dry, arid, and semi-arid climates, as well as absolute deserts (such as Chalbi Desert and Nyiri Desert).

Lake Victoria is one of the African Great Lakes. With a surface area of approximately 59,947 km (23,146 sq mi), Lake Victoria is Africa's largest lake by area, the world's largest tropical lake, and the world's second-largest fresh water lake by surface area after Lake Superior in North America. In terms of volume, Lake Victoria is the world's ninth-largest continental lake, containing about 2,424 km (1.965×10 acre⋅ft) of water. Lake Victoria occupies a shallow depression in Africa. The lake has an average depth of 40 m (130 ft) and a maximum depth of 80–81 m (262–266 ft). Its catchment area covers 169,858 km (65,583 sq mi). The lake has a shoreline of 7,142 km (4,438 mi) when digitized at the 1:25,000 level, with islands constituting 3.7% of this length.

The lake's area is divided among three countries: Tanzania occupies 49% (33,700 km (13,000 sq mi)), Uganda 45% (31,000 km (12,000 sq mi)), and Kenya 6% (4,100 km (1,600 sq mi)).

Zanzibar is a Tanzanian archipelago off the coast of East Africa. It is located in the Indian Ocean, and consists of many small islands and two large ones: Unguja (the main island, referred to informally as Zanzibar) and Pemba Island. The capital is Zanzibar City, located on the island of Unguja. Its historic centre, Stone Town, is a World Heritage Site.

Zanzibar is also a semi-autonomous region that united with Tanganyika in 1964 to form the present-day United Republic of Tanzania. The archipelago's main industries are spices, raffia, and tourism. The main spices produced are clove, nutmeg, cinnamon, coconut, and black pepper. The Zanzibar Archipelago, together with Tanzania's Mafia Island, is sometimes referred to locally as the "Spice Islands". Tourism in Zanzibar is a more recent activity, driven by government promotion that caused an increase from 19,000 tourists in 1985, to 376,000 in 2016. The islands are accessible via five ports and the Abeid Amani Karume International Airport, which can serve up to 1.5 million passengers per year.

Tusks are elongated, continuously growing front teeth that protrude well beyond the mouth of certain mammal species. They are most commonly canine teeth, as with narwhals, chevrotains, musk deer, water deer, muntjac, pigs, peccaries, hippopotamuses and walruses, or, in the case of elephants, elongated incisors. Tusks share common features such as extra-oral position, growth pattern, composition and structure, and lack of contribution to ingestion. In most tusked species both the males and the females have tusks although the males' are larger. Most mammals with tusks have a pair of them growing out from either side of the mouth. Tusks are generally curved and have a smooth, continuous surface. The male narwhal's straight single helical tusk, which usually grows out from the left of the mouth, is an exception to the typical features of tusks described above. Continuous growth of tusks is enabled by formative tissues in the apical openings of the roots of the teeth.

Other than mammals, dicynodonts are the only known vertebrates to have true tusks.

Insecticides are pesticides used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. The major use of insecticides is in agriculture, but they are also used in home and garden settings, industrial buildings, for vector control, and control of insect parasites of animals and humans.

Acaricides, which kill mites and ticks, are not strictly insecticides, but are usually classified together with insecticides. Some insecticides (including common bug sprays) are effective against other non-insect arthropods as well, such as scorpions, spiders, etc. Insecticides are distinct from insect repellents, which repel but do not kill.

Swahili, also known as Kiswahili, is a Bantu language originally spoken by the Swahili people, who are found primarily in Tanzania, Kenya, and Mozambique (along the East African coast and adjacent littoral islands). Estimates of the number of Swahili speakers, including both native and second-language speakers, vary widely. They generally range from 150 million to 200 million; with most of its native speakers residing in Tanzania and Kenya.

Swahili has a significant number of loanwords from other languages, mainly Arabic, as well as from Portuguese, English and German. Around 40% of Swahili vocabulary consists of Arabic loanwords, including the name of the language (سَوَاحِلي sawāḥilī, a plural adjectival form of an Arabic word meaning 'of the coasts'). The loanwords date from the era of contact between Arab slave traders and the Bantu inhabitants of the east coast of Africa, which was also the time period when Swahili emerged as a lingua franca in the region.