In 2013 to celebrate the Birds of Australia, the Perth Mint released a very Limited Issue Regent Bowerbird 50c Fifty Cent Silver Proof Coin struck in solid fine .9999 Silver weighing one half of an ounce of pure Silver.
The reverse designed by Natasha Muhl depicts a male and female Regent Bowerbird while the obverse features a serene portrait of Her Majesty Queen Elizabeth II designed by Ian Rank Broadley.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.