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  • The Ugalla region of western Tanzania is a dry woodland savanna and home to chimpanzees that apparently use tools to dig up the underground storage organs of plants for food. The tool-using behavior may parallel the behavior of early hominids who left the forest for the African savanna five million years ago, according to University of Wisconsin-Madison anthropology professor Travis Pickering.
    Images courtesy Jim Moore, University of California at San Diego.
    The Ugalla region of western Tanzania is a dry woodland savanna and home to chimpanzees that apparently use tools to dig up the underground storage organs of plants for food. The tool-using behavior may parallel the behavior of early hominids who left the forest for the African savanna five million years ago, according to University of Wisconsin-Madison anthropology professor Travis Pickering.
  • Pictured are sticks used as tools by savanna chimpanzees to excavate underground food resources. Tool-wielding savanna chimps of western Tanzania used these sticks to crack a tough layer of soil to excavate the underground storage organs - tubers, roots and bulbs - of plants as a food resource. The behavior by chimps to excavate underground food resources with tools has never been documented before, according to University of Wisconsin-Madison anthropologist Travis Pickering, and may resemble behaviors of the earliest hominids as they migrated from the forest to the African savanna five million years ago.
    Pictured are sticks used as tools by savanna chimpanzees to excavate underground food resources. Tool-wielding savanna chimps of western Tanzania used these sticks to crack a tough layer of soil to excavate the underground storage organs - tubers, roots and bulbs - of plants as a food resource. The behavior by chimps to excavate underground food resources with tools has never been documented before, according to University of Wisconsin-Madison anthropologist Travis Pickering, and may resemble behaviors of the earliest hominids as they migrated from the forest to the African savanna five million years ago.
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