This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Tailypo (American Folklore) (Appalachia)
The Tailypo is usually said to be the size of a dog. Depending on the storyteller, it has yellow or red eyes, pointed ears and a long tail, and maybe tufted ears like a bobcat. It is nocturnal, covered in dark fur to blend into its environment. It only attacks with its claws, suggesting it is an animal, not a more versatile demon or spirit.
It speaks some English, demanding the return of its tail (the actual phrase varies from version to version, but always repeats). The legend of the critter with red, glistening eyes, matted black fur and a stumpy hairless tail has captivated Bauserman's attention for decades and has haunted the hearts and minds of Appalachian children for generations.