James "Blood" Ulmer is an American jazz, free funk and blues guitarist and singer. Ulmer plays a Gibson Byrdland guitar. His guitar sound has been described as "jagged" and "stinging". His singing has been called "raggedly soulful".

The Byrdland is an electric guitar made by Gibson. Its name derives from the names of guitarists Billy Byrd and Hank Garland for whom Gibson originally custom-built the guitar.