San Diego, California - For more than four decades, Charles "Chuck" Bieler, executive director emeritus of San Diego Zoo Global, has been called a mentor, leader, and friend to the global zoo community.

San Diego Zoo Global awarded Charles Bieler the Conservation Advocate Medal at a luncheon held Thursday, August 7, at the San Diego Sheraton Hotel and Marina. He was recognized in a ceremony attended by many of his friends from the zoo world, along with Joan Embery, San Diego Zoo Global's conservation ambassador.