introducing a new bird

:pied: I have had my cockatiel for a while now and have just found out that it is a female! However, I do not see it laying any eggs so that is a little concerning since my cockatiel was found I do not know if she is at the right age for it or if this is a big deal or not. I also want to get my...

A friend of a friend needs a new home for her tiel, a girl. I have two already, both boys. I also have two Quakers, a budgie, a pigeon and a starling. The starling lives separately from everyone else, but the rest share a set-aside bird room where they are out of the cages from breakfast until...