The only zoo of the list i've vistited by myself is San Antonio, altough its not the ebst zoo in the Us, my visit was in 2002, I can not agree with that list, you can not compare an Us Zoo with Zoos in egypt, these are two diffrent worlds.
In Japan, I've seen a lot of really bad Zoos, and not only small city zoos, even the "big"zoos in japan can not be compared with western zoos....