It is very hard to breed Tiels. And chances are he will not breed with just any female tiel. Do you know for sure that he is a male? Have you got him DNA tested to find out? Because that is the only real way to tell. I had a male and a female Tiel and they lived together 10 years, and never once bred. the reason he is being loud, could be cause of several different reasons.. He is bored, lonely, hungry, thursty, singing, playing, wanting out, needs his cage cleaned, needs a mist bath.. Out of all my years of owning birds, they usually get noisy just because they feel like it. And cockatiels are notorious for that!