These birds are cracking me up.
Two parents, two babies. The babes are the ones giving the ringwraith hiss. (Sorry for the poor quality - the camera's batteries are down. This is via my old phone)
I didn't move fast enough for them:
Note: I'm no 'Lord of the Rings' freak - although I read them through three times as a teen. But I did love the screech Peter Jackson gave to the ringwraiths in the films. Exactly how I heard it in my head when I was a kid. And eerily similar to these 'keets.