I'm sure there are some masks like that out there, but if you're the DM you're, of course, free to create any item. If you're aiming for a specific mask, you could include the distinctive features of it, but applying the bird theme...
Example: The "Mask of Blood" (MIC p.115), appears to be streaming blood all the time. Turn the mask into a bloody skinned bird's face and it becomes a truly memorable item... (and your game goes up a notch in the rating system
)
In a recent adventure my gaming group was playing, the PCs looted an amulet of natural armor +1. That amulet was crafted from the embalmed head of a bird.