male or female?

Hi. In cockatiels with "normal" coloration, you are generally right. The Males usually have much yellower heads with well defined edges, while the females have more muted yellow on their heads and it blends into the gray more gradually. The males do tend to be more vocal, but some females can be quite vocal as well. As for cuddliness? I've had our birds - two of each gender - and I have seen no difference between how much they like to cuddle. I think that may be more an issue of how they were raised and how much time they spend with people, rather than one of their gender. However, barb is right - the only real way to be sure of a bird's gender is through egg laying or DNA sexing.

How many birds do you have?

Anne

I have 2 yellow cockatiels - female
One gray cockatiel female, 2 gray cockatiels male.
The only reason I know this is by the egg laying. I had guessed at the sex by their behavior and was correct. The males are louder!