in 2004 and 2005, respectively. The 2011 Census of India recorded 12 males and three females. During a 2014 circumnavigation, researchers recorded six females, seven males (all apparently under 40 years old) and three children younger than four. A handbook released in 2016 by the Anthropological Survey of India on "Vulnerable Tribe Groups" estimates the population at between 100 and 150. Practices The Sentinelese are hunter-gatherers. They likely use bows and arrows to hunt terrestrial wildlife and more rudimentary methods to catch local seafood, such as mud crabs and molluscan shells. They are believed to eat a lot of molluscs, given the abundance of roasted shells found in their settlements. They are not known to engage in agriculture. Both sexes wear bark strings; the men tuck daggers into their waist belts. They also wear some ornaments such as necklaces and headbands, but are essentially naked. Usual habitations include small temporary huts erected on four poles with slanted leaf-covered roofs. Sentinelese appreciate the value of metal, having scavenged it to create tools and weapons, and accepted aluminium cookware left by the National Geographic Society in 1974. There is no evidence of their having knowledge of metallurgy outside of cold forging to make tools such as arrow heads, though Andamanese scholar Vishvajit Pandya notes that Onge narratives often recall voyages by their ancestors to North Sentinel to procure metal. Canoes are used for lagoon-fishing, but long poles rather than paddles or oars propel them. They seldom use the canoes for cross-island navigation. Artistic engravings of simple geometric designs and shade contrasts have been seen on their weapons. The women have been seen to dance by slapping both palms on the thighs whilst simultaneously tapping the feet rhythmically in a bent-knee stance. Similarities and dissimilarities to the Onge people have been noted. They prepare their food similarly. They share common traits in body decoration and material culture. There are also similarities in the design of their canoes; of all the Andamanese tribes, only the Sentinelese and Onge make canoes. Similarities with the Jarawas have been also noted: their bows have similar patterns. No such marks are found on Onge bows, and both tribes sleep on the ground, while the Onge sleep on raised platforms. The metal arrowheads and adze blades are quite large and heavier than those of other Andamanese tribes. Language Because of their complete isolation, nearly nothing is known about the