Bush bird names e.g. Happy Families

["Gemfyre" <>]

Speaking of SA bird names.  While I was over there last summer visiting my 
b/f's family I tried to find out what kind of bird the "Piping shrike" on 
the SA flag was.  I asked his dad, who has dabbled in birdwatching and he 
couldn't remember.  And going by the stylised picture on the flag I thought 
it might be a Magpie Lark and kept teasing my b/f about the fact that his 
state bird was a dopey Peewee.
Once I got home and was able to look it up I found that a Piping Shrike is 
nothing more than a Magpie.  At least it's more noble than Peewee.  Now I 
wonder why on earth they always refer to it as a Piping Shrike on the flag 
rather than a magpie and why did they choose a magpie?  It's hardly a bird 
exclusive to SA (although admittedly Black Swans are found out of WA too).
Gemfyre