I think that subject line speaks for itself...and I must admit, I'm kinda envious of zoologist Mark Carwardine. This is from the BBC series Last Chance To See: [youtube]http://www.youtube.com/watch?v=9T1vfsHYiKY[/youtube]

The kakapo is an ancient species of parrot of New Zealand that is critically endangered. They are nocturnal and flightless. Males attract females by giving a low booming sound that is said can be heard for miles.

Thanks to Ken F. for the heads up.