In this Saturday, April 26, 2014, file photo, a Royal Bengal tiger prowls in Sunderbans, at the Sunderban delta, about 130 kilometers (81 miles) south of Calcutta, India. India's latest tiger census shows a sharp increase in the number of endangered cats in the wild, raising hopes that conservation efforts are working.
In this Saturday, April 26, 2014, file photo, a Royal Bengal tiger prowls in Sunderbans, at the Sunderban delta, about 130 kilometers (81 miles) south of Calcutta, India. India's latest tiger census shows a sharp increase in the number of endangered cats in the wild, raising hopes that conservation efforts are working. Joydip Kundu AP
In this Saturday, April 26, 2014, file photo, a Royal Bengal tiger prowls in Sunderbans, at the Sunderban delta, about 130 kilometers (81 miles) south of Calcutta, India. India's latest tiger census shows a sharp increase in the number of endangered cats in the wild, raising hopes that conservation efforts are working. Joydip Kundu AP