|Biome||Tropical and subtropical moist broadleaf forests|
The Congolian rainforest is the world's second-largest tropical forest, spans six countries, and contains a quarter of the world's remaining tropical forest. With annual forest loss of 0.3% during the 2000s, the region has the lowest deforestation rate of any major tropical forest zone.
To the north, south, and southwest, the forests transition to drier forest-savanna mosaic, a mosaic of drier forests, savannas, and grasslands. To the west, the Congolian forests transition to the coastal Lower Guinean forests, which extend from southwestern Cameroon into southern Nigeria and Benin; these forests zones share many similarities and are sometimes known as the Lower Guinean-Congolian forests. To the east, the lowland Congolian forests transition to the highland Albertine Rift montane forests, which cover the mountains lining the Albertine Rift, a branch of the East African Rift system. The Congolian Forests are a global 200 ecoregion.
- Atlantic Equatorial coastal forests (Cameroon, Equatorial Guinea, Gabon, Republic of the Congo, Angola, Democratic Republic of the Congo)
- Northwestern Congolian lowland forests (Cameroon, Central African Republic, Gabon, Republic of Congo)
- Western Congolian swamp forests (Republic of the Congo, Democratic Republic of the Congo)
- Eastern Congolian swamp forests (Democratic Republic of the Congo)
- Central Congolian lowland forests (Democratic Republic of the Congo)
- Northeastern Congolian lowland forests (Democratic Republic of the Congo, Central African Republic)
- "Congo Basin Forest Partnership". USAID. Archived from the original on 2008-05-08. Retrieved 2008-05-06.
- Mayaux, P.; Pekel, J. F.; Desclée, B.; Donnay, F.; Lupi, A.; Achard, F.; Clerici, M.; Bodart, C.; Brink, A.; Nasi, R.; Belward, A. (2013). "Mayaux et al 2013". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. Philosophical Transactions of the Royal Society B. 368 (1625): 20120300. doi:10.1098/rstb.2012.0300. PMC 3720022. PMID 23878331.
- "Deforestation in the Congo Rainforest". Mongabay.
- Linder, H. Peter, Helen M. de Klerk Julia Born et al. (2012). "The partitioning of Africa: statistically defined biogeographical regions in sub‐Saharan Africa". Journal of Biogeography Volume 39, Issue 7 May 2012. 
- Congo Basin Ecoregions, Yale School of Forestry and Environmental Studies
- The Congo Rainforest