The St. Helena & Ascension bioregion comprises a grouping of small volcanic islands in the middle of the Atlantic Ocean more than 800 nautical miles from the Gulf of Guinea.

The Southwest African bioregion, located in the Afrotropics realm, runs the length of Namibia’s Atlantic Coast through the southern half of Angola. It is an extremely arid region consisting of sandy coastal deserts, steppe, and dry savanna woodlands with four ecoregions altogether totaling approximately 27 million hectares of land area.

The Greater Karoo & Kalahari bioregion, located in the Afrotropics realm, encompasses the large expanse of dry savannas and woodlands between the Highveld in South Africa and the coastal deserts of Namibia. It contains four ecoregions totaling approximately 121 million hectares of land area.

The Southeast African bioregion, located in the Afrotropics realm, is centered around the inland Highveld, a plateau formed by the Great Escarpment ridge in South Africa dominated by mountain grasslands, which transition to subtropical grasslands in the east and mid-altitude bushlands in the north. It contains five ecoregions.

The South African Cape bioregion is the only Mediterranean bioregion in the Afrotropical realm. It is confined to the small southern coastline of the continent and incorporates the succulent Karoo ecoregion, which is tightly interlinked with the dominant shrublands. It contains five ecoregions.

The Tristan Volcanic Islands bioregion, located on the western edge of the Afrotropics realm, is a single ecoregion of small islands in the far south of the Atlantic Ocean.

The West African Coastal Forests & Savanna bioregion, located in the Equatorial Afrotropics subrealm, consists of tropical coastal forests and mangroves as well as Guinean mountain forests and forest-savanna and contains seven ecoregions.

The Gulf of Guinea Coastal Forests & Mangroves Bioregion, located in the Equatorial Afrotropics subrealm, consists of lush tropical forests and mangroves lining the coastline of Gabon, Equatorial Guinea, Cameroon, and Nigeria, and includes Bioko, São Tomé, Príncipe, and Annobón islands. It contains eight ecoregions.

North Congolian Forest-Savannas bioregion, located in the Equatorial Afrotropics subrealm, includes the Cameroon Highlands to the west and extends above the Congolian lowland forests to the Sudd in the east. It contains two ecoregions totaling approximately 74.5 million hectares.

The North Congolian Lowland bioregion, located in the Equatorial Afrotropics subrealm, includes the densely forested lowland areas above the Congo River, bounded to the east by the Albertine Rift. It is divided into western and eastern halves and is made up of two major ecoregions totaling 95 million hectares.

The Central Congolian bioregion, located in the Equatorial Afrotropics subrealm, is in the Cuvette Centrale region of the Congo Basin, south of the Congo River. It is made up of three ecoregions totaling nearly 64 million hectares.

The South Congolian bioregion, located in the Equatorial Afrotropics subrealm, covers the area between the northern coast of Angola and mountains in the east of DRC, running along the Albertine Rift. It contains two ecoregions and adjacent marine areas.

The Victoria Basin bioregion, located in the Equatorial Afrotropics, is centered on Lake Victoria at the border between Kenya, Tanzania, and Uganda, and the surrounding forest-savanna. It contains three ecoregions.

The Greater African bioregion is the largest in the Afrotropics realm, covering the entire width of the continent from the drylands and grasslands of southern Africa north to the beginning of the Equatorial forest zone, extending to the southern shore of Lake Victoria. The bioregion contains 20 distinct ecoregions.

The Mascarene bioregion, located in the Madagascar & Eastern Afrotropics subrealm, is an archipelago of islands in the Indian Ocean just east of Madagascar, which includes Mauritius, Réunion, and Rodrigues, plus a variety of reefs, atolls, and small islands.

The Amsterdam-Saint Paul bioregion, located in the far south of the Indian Ocean, is at the furthest edge of the Afrotropics realm, at the transition between the Indomalayan and Antarctic realms. Its two islands are dominated by temperate grasslands, with one single ecoregion and adjacent marine areas.

The East African Coastal bioregion, located in the Afrotropics realm, extends in a narrow band nearly the entire length of Africa’s eastern coast. It consists of tropical and subtropical moist forests, including seven ecoregions.

The Madagascar bioregion, located in the Afrotropics realm, is separated from the African continent by the Mozambique Channel, dominated by humid tropical forests in the east, drylands in the south, and dry forests in the north. It contains eight ecoregions.

The Seychelles & Comoros bioregion, located in the Afrotropics realm, consists of two archipelagos of islands in the Indian Ocean north of Madagascar and contains three ecoregions covering an area of approximately 250,000 hectares, not including reefs and adjacent marine areas.

The Sahel Acacia Savannas bioregion, located in the Sub-Saharan Afrotropics subrealm, consists of three ecoregions.

The Sudanian Savannas bioregion, located in the Sub-Saharan Afrotropics subrealm in the Afrotropics, is made up of four ecoregions—the West Sudanian Savanna, East Sudanian Savannas, Mandara Plateau woodlands, and the Sudd flooded grasslands.

The Cape Verde Islands bioregion, located in the Afrotropics realm, contains the group of ten volcanic islands off the coast of Senegal and is defined by one dry forest ecoregion with a total land area of approximately 450,000 hectares.

The South Red Sea & Gulf of Aden Coastal Drylands bioregion, located in the Horn of Africa subrealm, consists of 12 ecoregions encompassing the Horn of Africa, the southern Red Sea, and Aden Sea, and the southernmost tip of the Arabian Peninsula.

The Somali Bushlands & Ethiopian Highlands bioregion is located in the Horn of Africa subrealm in the Afrotropics and is made up of eight ecoregions.