where does the niger river start and end
Niger River The Niger River (/ˈnaɪdʒər/ NY-jər; French: (le) fleuve Niger, pronounced [(lə) flœv niʒɛʁ]) is the principal river of western Africa, extending about 4,180 km (2,600 mi). Its drainage basin is 2,117,700 km2 (817,600 sq mi) in area.[3] Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Niger Delta or the Oil Rivers, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the third-longest river in Africa, exceeded only by the Nile and the Congo River (also known as the Zaïre River). Its main tributary is the Benue River.
Congo River The Congo River (also spelled Kongo River and known as the Zaire River; French: (le) fleuve Congo/Zaïre; Portuguese: rio Congo/Zaire; Kongo: Nzâdi Kôngo) is the second longest river in Africa after the Nile and the second largest river in the world by discharge volume of water (after the Amazon), and the world's deepest river with measured depths in excess of 220 m (720 ft).[2] The Congo-Chambeshi River has an overall length of 4,700 km (2,920 mi), which makes it the world's ninth-longest river. The Chambeshi is a tributary of the Lualaba River, and Lualaba is the name of the Congo River upstream of Boyoma Falls, extending for 1,800 km.