albp

A german vampire-like spirit associated with the incubus, tormenting the nights and dreams of mostly woman. Long connected with the nightmare, the alp is considered male.  It can fly like a bird, ride a horse and is credited with a certain gallant attitude, rarely forcing itself violently upon its victims.  It can appear as a cat, pig, bird, or dog.  In all of its manifestations its known to wear a kind of hat.  The alp is very protective of its hat, and if lost or stolen loses much of its power, especially oits invisibility and strength. It thus rewards generously anyone who returns it. The alp must also safegurad its eye, for in that orb resides its means to torment the sleep and dreams of a victim.

Information gathered from Mathew Buson's Vampire Encyclopedia.