In this May 7, 2013 photo provided by the Chicago Zoological Society, two sloth bear cubs are seen on exhibit with their mom Hani. at the Brookfield Zoo in Brookfield, Ill. Until May 8, the 3 1/2-month-old male and female cubs, born Jan. 20. have been off exhibit with their mother in a maternity den. A total of fewer than 20,000 bears are thought to remain in the wild. There is evidence of wild populations having declined 30 to 49 percent in the last 30 years due to deforestation and poaching mainly for the medicinal market. Currently, there are 39 sloth bears exhibited at 18 North American zoos accredited by the Association of Zoos and Aquariums. (AP Photo/Chicago Zoological Society, Jim Schulz)