Through analysis of stable isotope data, their environment is believed to have been more closed woodland canopies surrounding Lake Turkana than are present today. The greatest density of woodlands at Allia Bay was along the ancestral Omo River. More open savanna was thought to exist in the basin margins or uplands. Similarly at Allia Bay, the environment was suggested as much wetter. While not definitive, nut or seed-bearing trees could have been present at Allia Bay, but more research is needed.

Diet

Studies of the occlusal

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