Question: Wodaabe are traders in which region between the Sahara desert and the Sudanian Savanna?

Documents:
source: Wodaabe
text: Wodaabe The Wodaabe (Fula: "Woɗaaɓe" ), also known as the Mbororo or Bororo, are a small subgroup of the Fulani ethnic group. They are traditionally nomadic cattle-herders and traders in the Sahel, with migrations stretching from southern Niger, through northern Nigeria, northeastern Cameroon, southwestern Chad, and the western region of the Central African Republic. The number of Wodaabe was estimated in 2001 to be 100,000. They are known for their elaborate attire and rich cultural ceremonies.

source: Sahel
text: Sahel The Sahel ( ) is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara to the north and the Sudanian Savanna (historically known as the Sudan region) to the south. Having a semi-arid climate, it stretches across the south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea. The name is derived from the Arabic word "sāḥil " (ساحل , ] ) meaning "coast" or "shore" in a figurative sense (in reference to the southern edge of the vast Sahara), while the name Swahili means "coastal [dweller]" in a literal sense.

source: Northern Congolian forest-savanna mosaic
text: Northern Congolian forest-savanna mosaic The Northern Congolian forest-savanna mosaic is a forest and savanna ecoregion of central Africa, part of the belt of transitional forest-savanna mosaic that lie between Africa's equatorial forests and the tropical dry forests, savannas, and grasslands that lie to the north and south. The Northern Congolian forest-savanna mosaic lies between the equatorial Congolian forests to the south and the drier East Sudanian savanna to the north. It extends from the Cameroon Highlands in the west, across central Cameroon and the southern Central African Republic to southwestern South Sudan and northeastern Democratic Republic of the Congo, where it is bounded on the east by flooded grasslands of the Sudd, the eastern block of the East Sudanian savanna, and the Albertine Rift montane forests.

source: East Sudanian Savanna
text: East Sudanian Savanna The East Sudanian Savanna is a hot, dry, tropical savanna ecoregion of Central and East Africa.

source: Guérewol
text: Guérewol The Guérewol (var. Guerewol, Gerewol) is an annual courtship ritual competition among the Wodaabe Fula people of Niger. Young men dressed in elaborate ornamentation and made up in traditional face painting gather in lines to dance and sing, vying for the attentions of marriageable young women. The Guérewol occurs each year as the traditionally nomadic Wodaabe cattle herders gather at the southern edge of the Sahara before dispersing south on their dry season pastures. The most famous gathering point is In-Gall in northwest Niger, where a large festival, market and series of clan meetings take place for both the Wodaabe and the pastoral Tuareg people. The actual dance event is called the "Yaake", while other less famous elements—bartering over dowry, competitions or camel races among suitors—make up the week-long Guérewol. The Guérewol is found wherever Wodaabe gather: from Niamey, to other places the Wodaabe travel in their transhumance cycle, as far afield as northern Cameroon and Nigeria

source: Geography of Mali
text: Geography of Mali Mali is a landlocked nation in West Africa, located southwest of Algeria, extending south-west from the southern Sahara Desert through the Sahel to the Sudanian savanna zone. Mali's size is 1,240,192 square kilometres.

source: Sahara Desert ant
text: Sahara Desert ant The Sahara Desert ant ("Cataglyphis bicolor") is a desert-dwelling ant of the genus "Cataglyphis". It inhabits the Sahara Desert and is one of the most heat tolerant animals known to date. However, there are at least four other species of "Cataglyphis" living in the Sahara desert, for example "C. bombycina", "C. savignyi", "C. mauritanicus" and "C. fortis".

source: Wildlife of Guinea
text: Wildlife of Guinea The wildlife of Guinea is very diverse due to the wide variety of different habitats. The southern part of the country lies within Guinean Forests of West Africa Biodiversity Hotspot, while the north-east is characterized by dry savanna woodlands. Ecoregions of Guinea are Western Guinean lowland forest, Guinean montane forest, Guinean forest-savanna mosaic, West Sudanian Savanna, and Guinean mangroves.

source: Sudanian Savanna
text: Sudanian Savanna The Sudanian Savanna is a broad belt of tropical savanna that runs east and west across the African continent, from the Atlantic Ocean in the west to the Ethiopian Highlands in the east. The Sahel, a belt of drier grasslands and acacia savannas, lies to the north, between the Sudanian Savanna and the Sahara Desert. To the south the forest-savanna mosaic is a transition zone between the Sudanian Savanna and the Guinean moist forests and Congolian forests that lie nearer the equator.

source: Acridocarpus monodii
text: Acridocarpus monodii Acridocarpus monodii is a species of plant in the Malpighiaceae family. It is endemic to central Mali, where it is limited to the Bandiagara Escarpment region, in the ecotone of the West Sudanian Savanna and Sahelian Acacia Savanna.

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Answer: Sahel