Ture. But there's no harm in trying, right?

Besides. I think Lucy likes it when I whistle. And if she enjoys it, then that's good enough for me, too.

Some tiel hens can learn to whistle and sing as well as males, but they're the exception not the rule. I used to have a tiel hen who could wolf whistle. Once every few months Mims will sing a multi-note song, but she sounds squawky not pure and whistling like a male.