Scotland's largest animal collection is 4 1/2km (3 miles) west of Edinburgh's city center on 32 hectares (80 acres) of hillside parkland. The zoo contains more than 1,500 animals, including white rhinos, pygmy hippos, and chimps. It also boasts the largest penguin colony in Europe housed in the world's biggest penguin enclosure. From April to September, a penguin parade is held daily at 2:15pm. Run by the Royal Zoological Society of Scotland, it highlights its role in wildlife conservation.