From their announcement:
Very little is understood about the Harook; they are unpredictable and have an unknown agenda. Although they have an affinity to other avian species of alien life, it would appear that they have disdain for all others, especially humanity. Their speech patterns, consisting of a complex series of squawks and screeches, do not seem to live up to the advanced technology they bear on the battlefield. This leads some to believe that an advanced, as of yet unknown, intelligence directs them.
These avian aliens come with 10 unique poses to a pack and stand slightly taller than the average human.
The models were sculpted by Pedro Navaro and painted by Spacejacker.
Check 'em out