Leeds Castle in Maidstone - a Kent tourist attraction – plans to close its aviary to save the facility's £200,000 annual running costs.
Chief executive Victoria Wallace said the money would be better spent managing and preserving the 900 year-old structure and its collections.
She said new homes would be found for the birds and their keepers would be offered alternative jobs or redundancy.
The aviary has been open at Leeds Castle since 1980.
Ms Wallace said zoo collections were now about conservation, research and education and they would not be able to achieve the high standards they wanted without the backing of a major zoological institution.
The aviary contains more than 100 species of birds from around the world
Source: BBC News