Chester White Chester White The Chester White is a breed of domestic pig which originated in Chester County, Pennsylvania. It was formerly known as the Chester County White. The Chester White was first developed around 1815–1818, using strains of large, white pigs common to the Northeast U.S. and a white boar imported from John Russell Duke of Bedford, Bedfordshire county, England, referred to as the Woburn breed, brought by Captain Jefferies of Liverpool, England. In 1848, two breeders at a county fair, one from Delaware County and the other from Chester County, showed their two breeds. The judge decided to use the
Chester Zoo and 155 were classified as threatened species. 134 species were kept as part of a managed captive breeding programme. The zoo manages the studbooks for Congo buffalo, jaguar, blue-eyed cockatoo, Madagascan tree boa, gemsbok (all ESB species), black rhinoceros, Ecuadorian amazon parrot, Mindanao writhe-billed hornbill, Sumatran Tiger and Rodrigues flying fox (all EEP species). In addition, Chester holds 265 threatened plant species. At the end of 2015, Chester zoo became the first zoo outside of New Zealand to breed the tuatara. The zoo opened "Islands at Chester Zoo" in July 2015, a project extending the footprint of the zoo by