lion, (Panthera leo), large, powerfully built cat (family Felidae) that is second in size only to the tiger; it is a famous apex predator (meaning without a natural predator or enemy). The proverbial “king of beasts,” the lion has been one of the best-known wild animals since earliest times. Lions are most active at night and live in a variety of habitats but prefer grassland, savanna, dense scrub, and open woodland. Historically, they ranged across much of Europe, Asia, and Africa, but now they are found mainly in parts of Africa south of the Sahara. An isolated population of about between 500 and 700 wild Asiatic lions constitute a slightly smaller population that lives under strict protection in India’s Gir National Park and Wildlife Sanctuary.