Male or female

[Vik]

Hello cockatiel lovers I'm new here. Can someone can tell me it's a male or a female?

 

[DonnaBudgie]

How old are they? The utino is more likely female than male. The pearl on the left is a female if it stays pearl as an adult but can't tell at before that.

If you know what color variety mutations the parents are I might be able to sex them. What was dad? What was mom?

Such sweet cockatiels! Makes me want one (or two)!