By 3 million years ago several australopithecine hominid species had developed throughout southern, eastern and central Africa. They were tool users rather than tool manufacturers. The next major evolutionary step occurred around 2.3 million BCE, when primitive stone tools were used to scavenge the carcasses of animals killed by other predators, both for their meat and their marrow. In hunting, H. habilis was most likely not capable of competing with large predators and was more prey than hunter, although H. habilis probably did steal eggs from nests and may have been able to catch small game and weakened larger prey such as cubs and older animals. The tools were classed as Oldowan.[18]