I've noticed some U.S. zoos display stickers on the admission booth that they are members of WAZA (World Association of Zoos & Aquariums) as well as AZA (the U.S. accrediting body). AZA itself is a member of WAZA, as are all the other major national and regional zoo associations. So I am just curious, what is the advantage of an individual zoo being WAZA accredited? On the WAZA website, they list every AZA accredited zoo in the U.S. with the WAZA accredited ones in bold. It appears only about 20% of AZA institutions are also WAZA accredited. Perhaps someone on the forum who is zoo staff can answer this.