Zurich Zoo, one of the largest in Europe (covering 27 hectares), was founded in 1929. It really took off in the mid-20th century, under the direction of Heini Hediger (who invented information panels and the mixing of species in enclosures), when the park was recognised for its scientific approach to species preservation. Its management and enrichment programmes now serve as examples for many other parks.
Zurich Zoo is committed to an ethical approach aimed at respecting wildlife. It adheres to the principles of the World Association of Zoos and Aquariums (WAZA) World Conservation Strategy for Zoos and Aquariums. The establishment also supports programmes in Switzerland and abroad aimed at conserving species and preserving habitats. Finally, in the scientific field, Zurich Zoo cooperates closely with an international network of universities, in particular with the University of Zurich and zoos.