I think this is a very good initiative by AFCD as is of good value for discussion when BirdLife launches the discussion on the status of Chinese Grassbird. It also provide useful information on potential habitat monitoring and management. But i share geoff and captain's concern on the potential over-estimation of population number.
I have been always wondering whether conservation plans for the HK population of Yellow-crested Cockatoo should be set up. It seems that AFCD does recognize the conservation value of this population. As said in the article, we might help to look for the remaining roosting habitats.
