Amur leopards are the rarest large cat in the world and only about 30 still exist. So it made me sad to see that the Oregon Zoo had to euthanize one of their two amur leopards yesterday. He was 17 years old and had terminal cancer. They gave him treatment the last few months with little success. The zoo still has one other amur leopard, so maybe whenever we visit Portland, we can go to the zoo and see her.