Nomads are known as a group of communities who travel from place to place for their livelihood. Some are salt traders, fortune-tellers, conjurers, ayurvedic healers, jugglers, acrobats, actors, story tellers, snake charmers, animal doctors, tattooists, grindstone makers, or basketmakers. Some anthropologists have identified about 8 nomadic groups in India, numbering perhaps 1 million people—around 1.2 percent of the country's billion-plus population. Aparna Rao and Michael Casimir estimated that nomads make up around 7% of the population of India.