Reclusive Youkai with traits of both humans and various birds, usually crows or ravens. Though civilized and intelligent, they are rarely seen outside the mountainous areas in the center of Eastern Japan. Even in those lands, Tengu often live ascetic lives in small, mountaintop villages, eschewing any interaction with human settlements. As such, little is known about them save that they are able to fly using the natural wings on their backs, and are usually very religious, often practicing Shugendo or a variant.
It is rumored that in addition to Bird Tengu, some of the more remote mountains are home to Wolf Tengu as well. The relationships between these two types of Youkai are not well understood.