Unkindness

The Unkindnesses were a bird-like species that lived in the "wildernesses of lost time" at the edge of Eleven-Day Empire. (PROSE: The Book of the War) They had the inherent ability to look into the future through dead flesh. (AUDIO: The Eleven Day Empire) Members of Faction Paradox would offer the Unkindnesses carrion in return for prophecies.

Just like the ravens of London, the Unkindnesses crowded around Tower Hill. (PROSE: The Book of the War)

Morlock believed that they ate their dead. (AUDIO: The Eleven Day Empire)

History
According to one Faction Paradox legend, the Unkindessess were drops of Grandfather Paradox's blood from the Act of Severance. (PROSE: The Book of the War, Tonton Macoute)

Anastasia Romanov once offered the Unkindnesses the corpse of a Siberian firebird in return for a prophecy. (PROSE: The Book of the War)

While searching for exotic meats to whet his appetite, Tonton Macoute did the blasphemous deed of killing an Unkindness, tearing off its wings, and eating it. The Faction punished him for this by imprisoning him in Cyclone Tracy. (PROSE: Tonton Macoute)

On the day that Lolita and the Seventy-Ninth Sontaran Assault Corps invaded the Empire, Justine McManus came to the Unkindnesses with a dead Dodo. They predicted the destruction of the Empire and Justine's escape. (AUDIO: The Eleven Day Empire) All the Unkindnesses flew away shortly before Lolita consumed the Empire. (AUDIO: The Shadow Play)

Behind the scenes
The illustration of Unkindnesses from The Book of the War was reused in the background of the title pages for all of the Mad Norwegian Press Faction Paradox novels and the two issues of Image Comics' Faction Paradox series.