(Portland, OR)  --  Officials at the Oregon Zoo in Portland say a rare leopard, thought to be one of the oldest among her species, has been euthanized.  Kia was a 20-year-old Amur [[ ah-MOOR ]] leopard who had been a resident of the Oregon Zoo since 2007.  Zoo curator Amy Cutting says Kia was diagnosed in 2014 with kidney disease and the big cat's condition was deteriorating lately.  There are reported to be fewer than 300 Amur leopards left in the world, with between 50 and 70 living in the wild.