Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Zoological Society of San Diego is a non-profit organization that operates the San Diego Zoo, the San Diego Zoo''s Wild Animal Park, and the Institute for Conservation Research. It was founded in 1916 under the leadership of Dr. Harry M. Wegeforth.The Zoological Society of San Diego claims the largest zoological society membership in the world, with more than 250,000 member households and 130,000 child memberships, representing more than a half million people. Society members enjoy free admission to the Zoo and the Wild Animal Park, a subscription to the monthly magazine ZOONOOZ, and other benefits depending on their level of membership.