Another amazing bird worth knowing about is the Lyrebird: <a href="https://www.youtube.com/watch?v=VjE0Kdfos4Y" rel="nofollow">https://www.youtube.com/watch?v=VjE0Kdfos4Y</a><p>It copies not just the songs of other birds, but man-made sounds as well! Check out the link, it's mindblowing.
I don't remember now where I read it, but crows will lead hunters to game. There was a certain signal the hunters would give to tell the crow that they were hunting, and the crow would fly over the game and dip its wing in a certain way to let the hunters know where it was without tipping it off.
there was also a part about this in BBCs Human Planet series <a href="https://www.youtube.com/watch?v=SpsdPSkfkGw" rel="nofollow">https://www.youtube.com/watch?v=SpsdPSkfkGw</a>