The bateleur (Terathopius ecaudatus)

Bateleurs are highly aerial birds that spend much time soaring and will frequently flight with exaggerated embellishments, perhaps when excited or angered.They tend to build a relatively small if sturdy stick nest in a large tree and lay only a single egg. Despite being a rather aggressive bird in other contexts, bateleurs are easily flushed from their own nest, making them exceptionally vulnerable to nest predators, including humans, and nest failures.