I have a 3 years old male cockatiel. He is living with me since he was few months old. Lately we visited some relatives who have cockatiel couple, and my bird went crazy after the female. So I bought another female cockatiel. She is 8 months old (the oldest I could find) but he doesn't seem to be interested in her at all. I decided to give them some time and put their cages beside each others with the doors open. The female sometimes is making a weird sound like crying while looking at the male (I have never heard the male making such a sound) . I am not sure if she is calling or threatening him. I googled it and it is the same sound the very young cockatiels made when they are asking for food. But I am sure she is not hungry and only making this sound when the male is near her. What does this sound mean? And could my male become interested in her later? She is with us for a week now and there doesn't seem to be a progress. Thanks.