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.
Adwaita
His shell cracked in late 2005, and a wound developed in the flesh underneath the crack. The wound became infected, which eventually led to his death from liver failure on 22 March 2006. Adwaita is estimated to have been at least 150 years old at the time of his death. Some estimates suggest the animal may have been at least 255 years old at the time of his death. If this latter estimate can be confirmed, Adwaita would have been the oldest known tortoise of modern times, living longer than Harriet by 80 years, and Tu'i Malila by 67 years.