Aldabra giant tortoise
Large tortoises are among the longest-lived animals. Some individual Aldabra giant tortoises are thought to be over 200 years of age, but this is difficult to verify because they tend to outlive their human observers. Adwaita was reputedly one of four brought by British seamen from the Seychelles Islands as gifts to Robert Clive of the British East India Company in the 18th century, and came to Calcutta Zoo in 1875. At his death in March 2006 at the Kolkata (formerly Calcutta) Zoo in India, Adwaita is reputed to have reached the longest ever measured lifespan of 255 years (birth year 1750). Today, Jonathan, a Seychelles giant tortoise ("A. g. hololissa"), is thought to be the oldest living giant tortoise at the age of years and Esmeralda is second at the age of years, since the death of Harriet at 176, a Galapagos giant tortoise. Esmeralda is an Aldabra giant tortoise.
Cockatoo
Cockatoos are often very affectionate with their owner and at times other people but can demand a great deal of attention. Furthermore, their intense curiosity means they must be given a steady supply of objects to tinker with, chew, dismantle and destroy. Parrots in captivity may suffer from boredom, which can lead to stereotypic behaviour patterns, such as feather-plucking. Feather plucking is likely to stem from psychological rather than physical causes. Other major drawbacks include their painful bites, and their piercing screeches. The salmon-crested and white cockatoo species are particular offenders. All cockatoos have a fine powder on their feathers, which may induce allergies in certain people. In general, the smaller cockatoo species such as Goffin's and quieter Galah's cockatoos are much easier to keep as pets. The cockatiel is one of the most popular and easiest parrots to keep as a pet, and many colour mutations are available in aviculture.
Larger cockatoos can live 30 to 70 years depending on the species, or occasionally longer, and cockatiels can live for about 20 years. As pets they require a long-term commitment from their owners. Their longevity is considered a positive trait as it reduces instances of the loss of a pet. The oldest cockatoo in captivity was a Major Mitchell's cockatoo named "Cookie", residing at Brookfield Zoo in Chicago, which lived to be 83 years old (1933–2016). A salmon-crested cockatoo named 'King Tut' who resided at San Diego Zoo was nearly 69 when he died in 1990 and a palm cockatoo reached 56 in London Zoo in 2000. However, anecdotal reports describe birds of much greater ages. 'Cocky Bennett' of Tom Ugly's Point in Sydney was a celebrated sulphur-crested cockatoo who was reported to have reached an age of 100 years or more. He had lost his feathers and was naked for much of his life. A palm cockatoo was reported to have reached 80 or 90 years of age in an Australian zoo, and a little corella that was removed from a nest in central Australia in 1904 was reported still alive in the late 1970s. In February 2010, a white cockatoo named 'Arthur' was claimed to be 90 years old; he had lived with a family for generations in Dalaguete, Cebu, before being taken to Cebu City Zoo.