 In Europe, 31 zoos – Rotterdam Zoo, Planckendael Zoo, Poznan Zoo, Colchester Zoo, Chester Zoo, Belfast Zoo, Edinburgh Zoo, Blackbrook Zoological Park, Děčín Zoo, Ostrava Zoo, Newquay Zoo, and Parken Zoo in Eskilstuna, among others – maintain the Negros Island variety of this species.Moreover, several zoos in the United States also maintain the species.The San Diego Zoo was the first zoo outside the Philippines to keep and breed Visayan warty pigs.