is disagreement regarding the origin of other records, especially during the migratory period. Ibises have been seen on all four of the islands where there are zoos that keep them. Introduced sacred ibises bred in the United Arab Emirates in the wildlife reserve on Sir Bani Yas Island, where 6 were introduced in the early 1980s, and which did not leave the island. There was only one left in 1989 and it died that year. Al Ain Zoo has had a flock since 1976, which had increased to some 70 birds by 1991. There are records of ibises showing up in Dubai since the 1980s. Birds in Al Ain initially stayed at the zoo, but began to fly from the zoo to the sewage treatment plant and a shallow wet area in the former public park, now luxury villa park, Ain Al Fayda, where their numbers increased slowly up to 32 in 1997 and they had bred by 1998. They were not numerous outside these locations in 2002, but by 2001 1–5 ibises would show up regularly in Dubai in such places as the golf course, the sewage treatment plant, and the construction site of the now completed Dubai International City. Breeding has since occurred in Dubai. The Dubai birds especially may be partially vagrants arrived from the Iraqi marshes, as they often show up during the migrating season. On the other hand, a bird showing up in Iran is suspected to be from the introduced UAE population. As of 2010 the population in Al Ain numbers over 75 birds, and the free-flying zoo birds roost in two subcolonies on top of their aviary. Birds regularly show up throughout the city and surrounding villages and can often be seen in the early morning in parks and roundabouts picking up scraps left by people the night before. A breeding population was listed as introduced on Bahrain since at least 2006, but it is also said to be a vagrant on the island. In Taiwan, the founding population escaped from a zoo prior to 1984, at which time the first wild birds were seen at Guandu in Taipei. In 1998 it was estimated that some 200 birds roamed freely, primarily in northern Taiwan. In 2010 it was added to the Checklist of Birds of Taiwan with the status of 'uncommon' (as opposed to 'rare'). By 2010 the birds were also occasionally sighted