Hyenas

Joel travels to Zambia to investigate Africa's most successful predator – the spotted hyena. He learns that they're unusual in many ways: highly social, dominated by females not males, and the only animals on earth capable of biting through bone. It becomes clear there's a hyena clan operating near camp when they are heard in the river, and captured on camera breaking into the camp's kitchen. Joel constructs his pod nearby, and uses hyena-call recordings and a puzzle box to test a key hyena attribute: intelligence.