When you think nothing could be worse, and there you have it, a flying pegomastax!!

I was attacked by one while mining flint and it stole my pick. Then it got my pike when I went to fight. That's when I noticed noticed that it didn't actually "steal" what was in my hand, but just disarmed me and dropped it in the ground. Check the ground and see if your stuff is there after they attack you. My pick was laying there near the spot of the initial attack.

First the ground becomes unsafe to keep stuff on you, now the skies?? Robin Hood obviously doesn't like me

While fighting it will attempt to swoop down on you. This attack will either steal food from your inventory or disarm you.