Old feeders have been moved out and five new ones installed at Bushy Park.
"The older version served us very well but, like all things, they evolved," Anderson said.
The new feeders are easy to clean and light to carry. They make it easy for the birds to be caught and for visitors to watch them fly in and out and feed.
Their design was a finalist in the Conservation Innovation Awards last year.
The feeders were launched at Bushy Park on August 21. The main sponsors were the TSB Bank, which sponsored the Pride of New Zealand Awards, and Biodiversity Protection Incorporated.