To get it going: There's some immediate non-starters in the bird list, like little grebe. Silver gull is only a vagrant to New Guinea and bush curlew is just barely found there. Hornbill is on the list twice under different names. A bunch of the widespread birds seem a little redundant for the concept, like great egret and great cormorant. I wouldn't like to see large birds like brolga or pelican squeezed in there.