Wild chimpanzee behavior suggests that a savannamosaic habitat did not support the emergence of hominin terrestrial bipedalism.

The article presents a study which investigated positional behavior and terrestriality in a savanna-mosaic community of chimpanzees (Pan troglodytes schweinfurthii) in the Issa Valley, Tanzania as the first test in a living ape of the hypothesis that wooded, savanna habitats were a catalyst for terrestrial bipedalism. Topics include terrestriality in a savanna-mosaic habitat, chimpanzee terrestriality in a savanna-mosaic habitat, and the hominin arboreal niche.