One way is to hold the canary on its back (as in, hold the canary in the palm of your hand where its tummy is facing towards you) and blow lightly/gently near its private area. If you see a small...
yes, but if he's ready to mate and she's not they'll fight and it can cause fatal damage so the only way you can know is to watch them and if it didn't go well separate them for 2 days and try it...