I would also like to point out that not all AZA accredited zoos are good and live up to the AZA standards. The Memphis, TN zoo is one of them. They're very lacking in terms of space for their animals. The cats are often in small enclosures and pace around so much that the ground has ruts in it from their pacing. I know that repetitive behavior isn't always a bad thing, but to the point of having ruts in the ground? The elephants also look malnourished. They have very saggy skin.