Hyenas are carnivorous mammals that typically live in savannas, grasslands, woodlands, and forests up to 13,000 feet in elevation. They range in size from 28-35 inches tall and weigh 90-190 pounds. Hyenas have a lifespan of around 25 years in captivity. They communicate through vocalizations like wailing calls and laughter, and mark their territory with anal gland secretions. Their only natural predator is humans.