We kept hearing bird noises out of the apartment window, I was trying to convince myself it was a bird of prey, as we see them high in the sky quite regularly.
But it was too noisy.... it was almost like the green parrots from Oman were here.....
After extensive searching (ok .... they were on the roof-top opposite) .... we tracked down the source of the noise.
They are yellow-crested cockatoos, which are sadly now rather endangered as so many have been captured for the pet trade.
For the moment HK is their refuge, however they are an invasive species - and their effect on the local ecosystem is being watched with interest.