There are three yellow tailed black cockatoos that have been hanging around, they all appear to be the same size. I have noticed two of them making eheheh noises whilst flapping their wings and 'kissing', is it a mother feeding a child? Please and thank you x
Yes, it is common juvenile behaviour. They are asking/begging for food.
If they're same size, they could be fledglings who haven't got the hang of getting their own food so beg from others.