One of the "mating helmets" used in the preservation of kakapos. Apparently they prefer mating with a person's head more than their own species, so this helmet was made to make it easier to collect semen samples from males. You can see a hilarious video with Stephen Fry on the BBC and their encounter with an overly-enthusiastic kakapo (https://www.youtube.com/watch?v=9T1vfsHYiKY).