It is a movie where an elderly couple found a little girl with birdlike features who couldn’t speak the human language. They raised it, and somewhere in the middle she went missing or something, but in the end she flew away, joining the birds.
It wasn’t in English, but I couldn’t make out the language. The quality is good so I don’t think it”s vintage.
Eep! (2010) – http://www.imdb.com/title/tt1295059/