User blog comment:DanteVin/Qrow's Crows and Where to Put Them/@comment-24994749-20161031165157/@comment-33460495-20161102150202

You have a point when you said that Qrow's shapeshifting ability is still a speculation, because it was seen in action only once. We probably need to see him transform into a crow again in the future episodes to confirm?

And again, I guess we don't have proof yet that he is the same crow in the Red, Black, and Yellow trailers?

This part of the Semblance page sounds like a speculation, though
 * This is potentially a callback to the appearances of crows as early as the "Red" Trailer. Crows also appeared in the "Black" Trailer and the "Yellow" Trailer, as well as episodes of the series itself, including "It's Brawl in the Family".