"Green Pygmy Goose". Perth Zoo website. South Perth, WA: Perth Zoo. 18 March 2009. Archived from the original on 21 February 2010. Retrieved 22 February 2010.
web.archive.org
"Green Pygmy Goose". Perth Zoo website. South Perth, WA: Perth Zoo. 18 March 2009. Archived from the original on 21 February 2010. Retrieved 22 February 2010.