sentences:  WAZA institutional members includes more than 250 zoos and aquaria, as well as about 25 regional associations.In addition, about 1300 zoos are linked to WAZA through membership in one of the regional or national association members, and more than 700 million visitors pass through these facilities each year.All members of the WAZA network are obliged to comply with “WAZA's Code of Ethics and Animal Welfare”, adopted by WAZA in 2003.