"Shapeshifting - Druids can assume a variety of animal forms to aid them in both travel and combat. The Night Saber panther and Storm Crow are just two of the shapes Druids will be able to assume." I found this on a archived version of the beta website.
Sorry i cant post the link.
In lord of the rings storm crows brought news of storms.
So storm crows are going to bring us bad news to the druids of a large storm happening and we know Queen Azshara can now control the tide.