NZ Falcon have many predators like cats. Some of their predators like Hedgehogs, Stoats and other mustelids prey only on the eggs.
The Falcons can catch prey that is larger than themselves. Their colour can change in different locations to hide from predators. Although some Falcons nest on the ground they can still fly.
If they nest on the ground they usually nest under rocks. The NZ Falcon live on Stewart Island and The Auckland Islands.
The Falcons communicate by rapidly repeating Kek-Kek-Kek. If the birds are immature then they communicate by screeching.