Ujung Kulon is the last known refuge for the critically endangered Javan rhinoceros after poachers killed the last remaining rhino in Cát Tiên National Park of Vietnam, where a small population of 10 or less remained in 2010. In Ujung Kulon the population has been estimated at 40-60 in the 1980s. Within 2001-2010 there have been 14 rhino births identified using camera and video traps. Based on recordings taken between February and October 2011, 35 rhinoceros have been identified, of which 22 were males and 13 females. Of these 7 were old, 18 adults, 5 youngsters, and 5 infant rhinos. Increasing from previous years, in 2013 there were 8 calves which 3 of them were female and 50 teenage and adult which 20 of them were female identified using 120 video cameras functioning at night with moving sensor. It was accurate data, because every rhino has unique morphology as finger print, mainly skin wrinkles around the eyes.