Context and objectivesThe conditions under which bipedal locomotion emerged are still unresolved. However, they are all strictly dependent on reconstructions of the environment. This project will contribute to the scientific community's understanding of the environments of early Australopithecines. Australopithecus anamensis is the oldest species of the genus and the first indisputably bipedal hominid. According to paleoecological analyzes (isotopes, fauna, soils, etc.) (2,3), these hominids were generalists living in mosaic environments, i.e. a mix of habitat types. However, the specifics of hominin exploitation of environments need to be further explored. Understanding the conditions of local environments is essential to understanding changes occurring on a global scale, such as climate change. The same principle applies to ancient environments: the local can impact the global. The concept of a realized niche describes a niche actually occupied by a species in a particular site (4), as opposed to the full range of environmental conditions that a species is capable of occupying. An animal might narrow its niche, for example, due to interspecific competition. The aim of this project is to explore the niche breadth and heterogeneity of Au. Anamensis.Located in both Kenya and Ethiopia, the Omo-Turkana Basin is of great importance in paleoanthropology, because it includes some of the most prolific geological formations hosting hominids, such as the Koobi Fora and Shungura formations (1). the overall research plan involves the comparison of three different fossil collections from the Turkana basin which are approximately 4 million years old (Ma): those of Mursi (Ethiopia), Allia Bay...... middle of the sheet.... .. Evolution, 49 (2): 206-229. And references therein.(3) Kingston, J.D., 2007. American Journal of Physical Anthropology, 134 (S45): 20-58. And references therein.(4) Malanson, GP, Westman, WE & YL Yan, 1992. Ecological Modelling, 64 (4): 261-277.(5) Walker, A, 2002. Evolutionary Anthropology: Issues, News and Review , 11 (S1): 38-41.(6) Behrensmeyer, A. K. & Kidwell, S. M., 1985. Paleobiology, 11(1): 105-119.(7) Dumouchel, L, 2013. Taphonomic study of assemblages of the Mursi geological formation et du member A of the Shungura formation, Ethiopia. Master in Anthropology, Université de Montréal.(8) Ward, CV et al., 2010. Philosophical Transactions of the Royal Society B., 365 (1556): 3333-3344.(9) Conroy, GC & Pontzer, H, 2012 Reconstructing Human Origins, third ed. Norton.(10) Behrensmeyer, AK & Reed KE, 2013. The paleobiology of Australopithecus: 41-60. Springer.