Family Groups. Wakos are surprisingly protective of their young, often leaving their burrows to slay humanoid prey and drag the corpses back to feed their pups. Adult wakos will sacrifice their lives if their pups (which typically range from 15 to 30 pounds) are threatened in an effort to allow them to flee to safety. Each wako pack is led by an oversized female, typically rising to leadership due to greater size and strength. These leaders hone their communication with the pack with their chilling call of ao-ao-ao and can rouse them quickly in times of danger.