Africa:
- Angola
- Benin
- Botswana
- Burkina Faso
- Burundi
- Cameroon
- Cabo Verde
- Central African Republic
- Chad
- Comoros
- Congo-Brazzaville
- Congo-Kinshasa
- Cote d'Ivoire
- Djibouti
- Equatorial Guinea
- Eritrea
- Ethiopia
- Gabon
- Gambia
- Ghana
- Guinea
- Guinea-Bissau
- Kenya
- Liberia
- Madagascar
- Malawi
- Mali
- Mauritania
- Mauritius
- Mozambique
- Namibia
- Niger
- Nigeria
- Rwanda
- Sao Tome and Principe
- Senegal
- Seychelles
- Sierra Leone
- Somalia
- South Africa
- South Sudan
- Sudan
- Swaziland
- Tanzania
- Togo
- Uganda
- Zambia
- Zanzibar
- Zimbabwe
Asia:
- Bangladesh
- Bhutan
- Brunei
- Cambodia
- China (southern regions)
- East Timor
- India
- Indonesia
- Laos
- Malaysia
- Maldives
- Myanmar
- Nepal
- Pakistan (southern regions)
- Philippines
- Singapore
- Sri Lanka
- Taiwan
- Thailand
- Vietnam
Australia:
- Christmas Island
- Cocos (Keeling) Islands
- Norfolk Island
Americas:
- The Caribbean (including the Bahamas, Cuba, Dominican Republic, Haiti, Jamaica, Puerto Rico, and Trinidad and Tobago)
- Central America (including Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama)
- Northern South America (including Brazil, Colombia, Ecuador, Guyana, French Guiana, Suriname, and Venezuela)
The tropical zone is known for its biodiversity, including rainforests, coral reefs, and savannas. It is home to many unique plant and animal species that have adapted to the warm, humid climate. The region also supports a significant portion of the world's population and is an important center for agriculture and tourism.