LifeFM's Special Comments Guest Shayne Hope from The West Australian / Sport FM saw this topic and covered it on their WAFL WORLD Program during the week.
You can have a listen here
http://sportfm.com.au/May%2026%202009%20WAFL%20WorldIn a nut shell
- Black Swans has been around for a while as a state sporting nickname as the Black Swan is the state emblem on the flag, WAFL jumper and even City of Perth logo due to the Swan River.
- Sandgropers is more an out of state name for Western Australians ie WA people don't use it much dont consider it much or an endeerment, ie like Queenslander being called Cane Toads.
- Black Ducks is an unofficial nickname for Swan Districts FC whose logo is also a Black Swan. A bit like how Glenelg are often referred to as the Bays.
Hope that covers it.