Species richness in Atewa Forest is far higher for most classes of organisms than is frequently cited. Plant richness, at over 1300 species, is almost double previous estimates and accounts for about 25% of Ghana’s entire flora. Butterflies richness in Atewa Forest accounts for over 70% of Ghana’s butterfly species. The number of globally threatened species recorded in Atewa is very much higher than is commonly reported, and amongst the highest known for any forest in West Africa. Over 100 species in Atewa Forest are threatened or near-threatened with extinction. Atewa Forest is home to 20% of all threatened species known to occur in the whole of Ghana. This includes three Critically Endangered (CE) species; a further two species are likely to be classified as CE once assessed.
Only 718 of the species recorded in Atewa Forest have been assessed for extinction risk on IUCN’s Redlist. Many plants and almost all butterflies still await assessment. Nonetheless, at least 106 species in Atewa Forest have been classified as globally threatened or near-threatened with extinction. This accounts for 20% of all threatened species in Ghana.