The greater flamingo was put down at Adelaide Zoo this morning after the bird's quality of life had significantly deteriorated due to complications associated with old age.
Known as Greater, the flamingo, whose sex is unknown, arrived at the zoo in 1933 but records are not clear whether it came from Cairo or Hamburg Zoo, the AAP news agency reported.
"Greater is best known for being the world's oldest flamingo and the last greater flamingo to have resided in Australia," Elaine Bensted, chief executive of the zoo, was quoted as saying.
But the flamingo took a turn for the worse this week when it was decided to humanely put it to sleep.
More From This Section
A memorial to Greater, who was almost blind, may be erected near the heritage listed flamingo pond.
Greater is survived by Chilly, a Chilean flamingo, who is now Australia's only remaining flamingo.
The average lifespan of Flamingos in captivity, according to experts, is over 60 years.