Diatryma

The diatryma was a large, flightless bird native to the Underdark.

Description
The gigantic bird was about 8 ft (2.4 m) - 12 ft tall.(3.7 m) Its short wings rendered it flightless. It had a thick neck and a deadly powerful hooked beak.

Ecology
The drow used their hugely plumed feathers for decoration. The mercenary Jarlaxle sported one of these on his wide brimmed hat, as both an ornamental and a functional magical item known as a feather of diatryma summoning. By blowing into the feather, Jarlaxle was able to summon a diatryma bird.

Appearances

 * Adventure modules:
 * Waterdeep: Dragon Heist


 * Novels:
 * The Legacy (mentioned only)
 * Servant of the Shard
 * Promise of the Witch-King
 * Road of the Patriarch