Hello. From looking at the picture, the cockatiel looks very much like a male because of the bright colors. There could be a small chance that your cockatiel is a female, but I don't know of any mutations. Males are generally brighter and more vocal, while females are more dull in color, a d are less vocal. Feel under his/her tail (where they poop from) and feel the pelvis.(the two lumps). If they are close together, then he is a male. If they are farther apart then she is a female. They would be farther apart because females are made for making eggs. :). I think from the picture, she looks like a male because of the bright feathers. If he is a male, his pelvis bones (lumps under tail) will be close together. If she is a female, they will be farther apart. I really hope this helped. Let me know if this works. Good luck!!!

Males sing and females squawk. So observe them and see how they behave

I have two normal gray cockatiels, one of which I am sure is a male, and the other is a female according to the previous owner, however I recently came across an article that says otherwise. Both cockatiels have bright yellow faces, no spots on their wings, and no stripes on their tails. The male has orange cheeks, and the female red. Both of them love to chirp and sing and get into small fights somewhat often. One thing that makes me think she is really a female is because every now the then the male rubs his vent on a toy in their cage (I know what this is) and the other has never done this once, but hasn't laid eggs either, which I read is normal. We got them when they were a few months old and now they're 5, so is it true that we've had her gender confused for this long, or is it possible (a mutation maybe?) for a female to look like this? In the attached picture, the bird I know is a male is on the right, the one on the left is the bird in question.