The Shantak were invented by H.P. Lovecraft for his Dreamlands, where they dwelt in the vicinity of Leng. They are usually described as being similar to dragons with horse-like heads. However, the description of a Shantak by August Derleth in The Gable Window is very similar to that of a Byakhee, suggesting that the two could be the same species (if one disregards the other description); they are described as bat-like with a height equal to or greater than a man, furry with beaked/vulture-like heads. It is possible that, like the relationship suggested for the Tcho-Tchos and Men of Leng, the two forms represent waking world and dream world forms of the same being.