Volunteer worker Claire Trimmer from Britain weighs a sloth at the Sloth Sanctuary in Cahuita de Limon August 25, 2010. The center shelters over 100 orphaned and injured sloths. The sloths receive rehabilitation before being returned to the forest, according to Judy Arroyo, a co-owner of the sanctuary. REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: ENVIRONMENT ANIMALS)