It was maintained and refined as a basic characteristic in the following hominid evolution including Homo habilis, H. erectus, H. sapiens, H. sapiens-sapiens, that is modern humans. To conclude we might ask a fairly provoking question. It is very important here to stress the complexity of the apes nest. It is deeply interwoven with pongid life. It supports an existential need which covers half of the animal's life, the nights.
Pongids are nomads.
Each animal produces one nest every night of its approximately 40 years' life. In contrast to the daytime spent mainly with locomotor activities and nutrition the large sized animals need rest and sleep in horizontal body position. In an evolutionary sense, the distinction of tree nests and ground nests is of primary importance. Thus, nest building behaviour shows much more protocultural characteristics than nut cracking or ant fishing in the toolmaker concept. It is based on the very marginal phenomenon of tool use, nest building is completely neglected.