Tropical Birds

[Hagrid]

No: HPFGUIDX 159062

We found out in OOTP that Sirius had a nice safe hiding place in 
Grimauld Place. Did he go there straight after leaving Harry in POA?

SB sent messages to Harry , not with owls, but with tropical birds. 
(personally, I hoped they came from Australia to forshadow a DADA 
teacher that wrestled Crocodiles)

But in light of OOTP, I am wondering if that was a decoy. By sending 
tropical birds, it would seem Sirius was on another continent, while 
he could have really just been arguing with Kreatcher all along. The 
Tropical Birds may have been transfigured owls or Buckbeak even.

Too imaginative? - were the tropics mentioned for a purpose?
aussie