On Yellow Tail Black Cockatoos

Many refer to them as yellow tail black cockatoo Whilst some do prefer to call them the weerloo From the song they sing as in small groups they fly The big dark brown parrots of human kind shy They sometimes hatch out two chicks but only one survive The weakest must die for the strongest to thrive Throughout their small range they are uncommon to rare Though with most other cockatoo species little in common they do share Save they too nest in a cavity of a tree stump or old tree And even in their range they are birds that one does not often see Their massive strong bills are as hard as a stone Designed for cracking of hakea nuts and shredding pine cone These large dark brown parrots bigger than a big crow Yet little about them I can claim to know.