ALL of mine that were sitting this year (so, four) got nippy and hissy. And yes, they would try to bite. Those beaks can hurt!
Only one managed to hatch out any eggs (remember I said the Muscovy drake was shooting blanks?). The Magpie hatched three eggs from a communal nest, but one of the babies drowned. We'd taken the rest of the eggs and put them in the incubator, but there was no a/c in the house and it got waaaaay too hot and killed the eggs, except one that had hatched and that baby wasn't doing well. We managed to get it stable and it is now almost full grown.
It has been one heck of a year. It's like something is telling me to give it up, but I won't. I'm too stubborn!