Urban Druid alternate shapes

[pimp-dragon]

I was wondering if there is some extension on the urban druid shapes in any magazine? My friend has been running me through this awesome Sharn adventure thats really detective like and kicks ass....anyways the urban druid enemy in this setting is able to turn into a Raven which isn't on the list inside the Dragon Compendium at all. He showed it to me and there isn't a reason with his abilities or anything why he can do that at all so I just thought if there was some resource I have missed or something.

[Warforged Goblin]

It's entirely possible that the urban druid in question is also a were-raven. CUE THE THRANISH INQUISITION!

[Rodergo Xativa]

Noone expects the Thranish Inquisition!!!