Pelicanman (2004)

Wanting to know the ways of people, a pelican turns into a gawky young man who soon learns to speak, thanks to his outstanding talent in imitation. He befriends Emil and Elsa, two children who--unlike adults--see that their new neighbor "Mr Berd" is not human but a big bird wearing a suit. The Pelican Man lands a job at the opera and falls in love with a pretty ballerina, looking so much like a bird herself. Troubles start when adults too find out about "Mr Berd's" ornithological origin.

Unfortunately the movie Pelicanman is not yet available on HBO Max.