The spotted hyena lives in large clans in South Africa’s plains and grasslands. But this male crocuta crocuta, who weighs about 130 pounds, lives alone at the Oakland Zoo in California. Perhaps that’s okay, because the females tend to weigh 25 pounds more and dominate the males. Only the highest ranking males mate and have no role in parenting. After birth, siblings immediately fight for dominance and nourishment until the weaker ones die.