Founded in 1826, the Zoological Society of London (ZSL) is an international scientific, conservation and educational charity whose mission is to promote and achieve the worldwide conservation of animals and their habitats. It runs the Institute of Zoology, conservation projects in more than 50 countries, and two Zoos, ZSL London Zoo and ZSL Whipsnade Zoo

The Zoological Society of Glasgow was founded on 14th December 1936 by Edward Hindle, who was a professor of zoology at the University of Glasgow. Its name was later changed to the Zoological Society of Glasgow and West of Scotland.

The Zoo Zürich is a zoo located in Zürich, Switzerland. Opened in 1929, it is the third oldest zoo in Switzerland

The Yangon Zoo is the oldest and the second largest zoo in Myanmar. The first collection of wild animals in Yangon began in 1882 in connection with Phayre's Museum, then situated at the present site of Yangon General Hospital. The zoological gardens was formally opened as the Victoria Memorial Park and Zoological Gardens in honour of Queen Victoria. In 1951, the then Burmese government changed the name to Rangoon Zoological Gardens and Parks

Wilhelma is a zoological-botanical garden in Stuttgart in the Bad Cannstatt district in the north of the city on the grounds of a historic castle. Wilhelma has a branch office located in Fellbach, where the zoo keeps its stallions

The Warsaw Zoological Garden is a scientific zoo located along the Vistula River in Warsaw, Poland. Although the current zoo was opened on 11th March 1928, its roots can be traced to 17th century private menageries, often open to the public. King John III Sobieski kept a court menagerie in Wilanow, and the 19th century saw several private zoos opened in the city

The Ueno Zoo, otherwise known as Tokyo Zoo, is a 14.3 hectare (35 acre) zoo, managed by the Tokyo Metropolitan Government, and located in Taitō, Tokyo, Japan. It is Japan's oldest zoo. The zoo is in Ueno Park, a large urban part that is home to museums, a small amusement park and other attractions. The zoo started its history as a menagerie attached to the National Museum of Natural History

Toronto Zoo is a zoo located in Toronto, Ontario, Canada. Around 1880, businessman Harry L Piper established a Zoological and Acclimatization Society (also as Toronto Zoological Garden) and opened a zoological garden. In 1888, the Riverdale Zoo opened in Toronto, as a typical example of a zoo during this time, with animals displayed as curiosities in dark cages and cramped enclosures. Animals from Piper's zoo moved to this site. In 1963, a private citizen's brief to build a new zoo was introduced by Hugh Crothers to the Chairman of the Council of the Municipality of Metropolitan Toronto, William Allen. Allen asked Crothers to head up a committee to investigate the feasibility of a new zoo. By 1966, a group of eleven people became The Metro Toronto Zoological Society with Crothers as the first chairman

Tierpark Dählhölzli is a public zoo in Bern, Switzerland. It opened in 1937 and is operated by an affiliated association, the Tierparkverein Bern. The city of Bern owns the zoo and provides most of its financing.