The home ranges of the Angola talapoin are likely to be larger, and the population densities lower, than is the case with Gabon talapoin because forest strips are narrower and resources scarcer. The fluctuations in climate since the last glaciation have probably reinforced this species' primary adaptation to 'strip living' as longer dry seasons and less extensive flooding under the generally cooler and drier climate that now dominates outside the rainforest seems to have favoured more terrestrial habits than are apparent in the Gabon talapoin. It mainly feeds on fruits, but also on seeds, young foliage, and invertebrates.