This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Chareng (Meitei mythology)
It is the story of a girl named "Hayainu" (alias Nongdam Atombi) who turned herself into a Langmeitong (Meitei for 'hornbill bird') as she was unable to suffer the ill treatments of her cruel stepmother. Hayainu's mother had died when Hayainu was a young girl. Hayainu's father married again. So, Hayainu lived with her father, stepmother, and stepbrother. Her father loved her but her stepmother hated her. The stepmother asked her to do all the household works. Hayainu served her stepmother faithfully but in return to her obedience, she was hated and would be beaten up by her cruel stepmother every day.
Once in Hayainu's dream, her real mother told her to go to the world of the Hornbills. In that dream, her mother suggested her to ask a flock of Langmeidongs coming near a lake every day to give her some of their feathers, collect and stitch them to her body and flew away. Hayainu woke up. She went to the spot and requested the birds for some of their feathers so that she could get a basketful of them. The birds fell pity on her and agreed. Once she got the feathers full of a basket, she wrapped some clothes around herself. The birds picked her up and she flew away with them.