Do females ever sing?

I have a pair, but I am not sure it is male and female....they are together all the time and do not take any notice of the female. They go in the nest together.
But..........the "female" had started to sing like a male, and do the wing thing
Will a female ever do that??

I will try to put a picture in......

yes a please

the fallow is a man, he has no striae in the tail. we can not know the sex of variegated by looking.

I know the Fallow is a male, and I know it is hard to tell at the Pied, but did any of you have a female, that did sing like a male?
In the cage there also is a female, but the Pied get angry at it if it gets near the nest

I had a pied female singing

They are very rare. But they exist !

So if there is no (you understand what I mean !), there are many probabilities for you to have a male !

Young male or Female?
It has a red band.

They do not......
But they go in nest together and attack the female

Are there something about cockatiels from France I should know?

yes! they speak french
band with pied is not proving that it's a female