“[The kakapo] is an extremely fat bird. A good-sized adult will weigh about six or seven pounds, and its wings are just about good for waggling a bit if it thinks it's about to trip over something — but flying is out of the question. Sadly, however, it seems that not only has the kakapo forgotten how to fly, but it has forgotten that it has forgotten how to fly."
~Douglas Adams

Also according to Douglas Adams, the frequency of the mating call of the male kakapo is so low that it's difficult for the female kakapo to determine where it is coming from, so you got a lot of horny kakapoes out there.

Here is a male getting frisky with the camera guy. The music and editing makes it so worth it.