The Detroit Zoological Society, a non-profit organization, operates both the Detroit Zoo and the Belle Isle Nature Zoo, located in the city of Detroit. The Detroit Zoological Society is responsible for the care and feeding of more than 1,800 vertebrates and 5,000 invertebrates representing over 270 species.

Stone Zoo, formerly known as the Middlesex Fells Zoo, is located on a 26-acre site near the sparkling Spot Pond reservoir in Stoneham, MA. Charles Price, Superintendent of the Metropolitan District Commission’s Middlesex Fells Reservation, founded the Zoo in 1905, and in 1969, the site was renamed in honor of Walter D. Stone, a former Zoo Director. Highlights of Stone Zoo’s collection include the snow leopards of Himalayan Highlands, bald eagles of Yukon Creek, hornbills and emperor tamarins of Windows to the Wild, and jaguars and cougars of Treasures of the Sierra Madre.(boston.com)