Answer:
Between 4-6 mya ape-hominin transitional species adopted bipedalism.
1.8 mya Homo erectus is found in Asia. First true hunter-gatherer ancestor, first to migrate out of Africa in large numbers and attains a brain size of around 1000
Australopithecus had a combination of humanlike and apelike traits: they were bipedal but had small brains.
Homo habilis appears to be intermediate in terms of evolutionary development between the primitive Australopithecus and the more-advanced Homo species.