Ravenatch

Ravenatch, the more advanced thief. Ravenatch is less patient than its previous form, going so far as to attack people and other monsters for their shinies. When several of these birds gather into a murder (flock of crows, sillies.) the bird with the largest gems or most sparkly item if head of the flock. The gems and jewels that are stolen by this bird are shuffled into their plumage for display; you can always tell which birds are paired off, as they'll have tokens of affection woven in amongst their head plumage, where no bird can reach unassisted.

Art: Henrie!
Ravenatch's creator: [link]
Monster MMORPG: [link]