Dire corby

The dire corby was a mutated semi-humanoid horror that was once a flightless bird. They were common to the southern reaches of the Underdark. Dire corbies were bipedal and black skinned, with a beaked bird's head, and the torso of a man; featherless and wingless. Both of its powerful-looking arms ended in hooked, wicked claws, and its legs ended in three-toed feet.

Belwar Dissengulp remarked that dire corbies look like a drow-bird crossbreed.

Dire corbies were known to inhabit one of the vaults in Gauntlgrym around 1479 DR.