It has a nice downloadable sound file called The Song of the Kakapo.
The text of the article itself comes from "Birds of South Westland" (c.1899) by Charles Edward Douglas, but it makes interesting (if not disturbing) reading, and might explain why the Kakapo is in such trouble today.
Kakapos are very good eating, whether old or young, but the old ones are too tough to roast, so the best way is to boil them over a slow fire for four or five hours, or cooking them in a Maori oven which is by far the quickest and best plan.
