Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-14909251-20150329235139

Spiegelmeister wrote: Something like that. It at least brings creedence to a few theories involving crows (Huginn and Muninn), legends/myths with shapeshifting crows (Odin and Freija), grimm/human hybrids (which I personally can't get behind), and crow faunus.

For now I like the theory that the crows in the trailers and the first episode are someone/ or are being used by someone to watch over the girls. That last bit is definitely a possibility. Maybe Qrow's Semblance allows him to talk to animals. It is definitely the kind of thing that would make him valuable as a spy.