The Cuban iguana is well-established in public and private collections.[19] Many zoological parks and private individuals keep them in captive breeding programs, minimizing the demand for wild-caught specimens for the pet trade.[19] Cuban iguanas are listed as "vulnerable" on the IUCN Red List,[1] as is the predominant Cuban subspecies,[31] while the Cayman Island subspecies is "critically endangered".[32] The total population in Cuba is estimated at between 40,000 and 60,000 individuals, and the feral population on Isla Magueyes is estimated at over 1,000.[1] According to Allison Alberts, Chief Conservation Officer of the San Diego Zoo and lead researcher in Cuba, among the many wildlife species at GTMO, "The Cuban Iguana is one of the largest, undoubtedly the most visible, and certainly the most charismatic. It seems that no one completes a tour of duty at GTMO without getting to know these prehistoric-looking giants."[5]