There are many people on here who look at a picture and take a guess, and are often wrong. I am not talking bad about them, but I want to help. If you have a bird that is say about three months old, up to 5 months (after that if it isn't pretty obvious maybe you have the wrong hobby) and you can't tell the sex, this will help you. THere are many things people look at to guess. But there is only one way that never misses. If it is a rooster, it will have POINTED feathers in its back and neck. Pick the bird up, fold the feathers on his back towards the front, and look at the newest colors coming in. If they are round, hen: If they are pointed, rooster. Good luck, with a little practice, it will be SOOOOO easy.