Bane said as they walked "He is the biggest and his coloring is different then the others...the ones we fought today most likely used to be humans...you can tell by the colorings. When you see the brown mixed with the tan, they are human. If they have black mixed with reds and are smaller in build but are thicker built, they used to be dwarves. Light coloring with white and blond used to be elves. We haven't seen hobbits yet or anything else...hopefully we won't see that" He sat down, taking his jacket off first and putting it over the chair. "So far we have only counted three different Alphas...they were made in Mordor and my guess they used to be Orcs or something like that." Bilbo shuttered at the thought of these creatures running thru the Shire. 

Gandalf sat by Elrond and asked "Have you heard of any such thing before?"