Philadelphia Zoo euthanises 25 yr old lioness 
Twenty-five-year-old Zenda, believed to be America's oldest African lioness, has been euthanised by the Philadelphia Zoo due to an "acute decline in her mobility and behavior". The statement issued by the zoo said that Zenda had exceeded the 17-year typical life expectancy for lions in zoos. Zenda arrived at the Philadelphia Zoo in 1993 at the age of 2.