I don't plan to breed him, I think he is just lonely, he is continuously calling out to the other birds and running around the cage non stop trying to find a way to get out and join them, I mean non stop, pays no attention to me just calls out for the other birds (the ones in the sky flying past) So I thought he could use a female to stop him being so intent on joining the other birds. I have had him 4 weeks and he was just a baby when I got him. I have not had budgies before.