<Tr> <Td> Lakshadweep </Td> <Td> Butterfly fish (Chaetodon falcula) </Td> <Td> Noddy tern (Anous stolidus) </Td> <Td> Bread fruit (Artocarpus incisa) </Td> <Td> </Td> <Td> </Td> </Tr> <P> As per the 2011 census of India, the estimated population of South India is 252 million, around one fifth of the total population of India . The region's total fertility rate (TFR) was less than the population replacement level of 2.1 for all states with Kerala and Tamil Nadu having the lowest TFRs in India at 1.7 . As a result, the proportion of the population of South India to India's total population has declined from 1981 to 2011 . The population density of the region is approximately 463 . Scheduled Castes and Tribes form 18% of the population of the region . Agriculture is the major employer in the region with 47.5% of the population is involved in agrarian activities . About 60% of the population lives in permanent housing structures . 67.8% of South India has access to tap water with wells and springs forming other major sources of water supply . </P> <P> After experiencing fluctuations in the decades immediately after the independence of India, the economies of South Indian states have registered growth higher than the national average over the past three decades . While South Indian states have improved in some of the socio - economic metrics, poverty continues to affect the region as it does the rest of the country, although it has considerably decreased over the years . Basis the 2011 census, HDI in the southern states is high and the economy has grown at a faster rate than most northern states . </P> <P> As per the 2011 census, the average literacy rate in South India is approximately 80%, considerably higher than the Indian national average of 74% with Kerala having the highest literacy rate of 93.91% . South India has the highest sex ratio with Kerala and Tamil Nadu being the top two states . The South Indian states rank amongst the top 10 in economic freedom, life expectancy, access to drinking water, house ownership and TV ownership . Poverty rate is at 19% while that in the other Indian states is at 38% . The per capita income is ₹ 19,531 (US $300), which is more than double of the other Indian states (₹ 8,951 (US $140)). Of the three demographic related targets of the Millennium Development Goals set by the United Nations expected to be achieved by 2015, Kerala and Tamil Nadu achieved the goals related to improvement of maternal health and of reducing infant mortality and child mortality by 2009 . </P>

Name the largest state in south india in terms of area