Rhinoceros are seen during the rhino census in the Pobitora wildlife sanctuary, 55 kilometers (34 miles) east of Guwahati, Assam, India, Tuesday, March 20, 2012. According to the 2009 census, the density of rhinos has increased from 84 to 93, senior forest officials said. Pobitora has the highest density of rhino population in the world. Photo Credit: Indian Photo Agency