Well, you know, the world is rapidly changing and I don't get to keep up with the news as well as I might. I figured that with all the drama in the South China Sea things may have gotten out of hand
parrakeet is an acceptable alternative spelling of parakeet (via the association with "parrot" with two Rs). It is true that parrakeet is an older form not often seen nowadays, but it is not by any stretch a "mistake".
Never mind the spelling - what a horrible, dated-looking sign. Has the feel of something you'd see at a downmarket farm park, rather than one of Europe's top zoos.