Each with a deep hooting bass, the Owlarina has two forms:

8-Hole Linear Diatonic

This system allows a full octave plus one additional note above the octave with a linear fingering pattern.  Be advised that this does not exactly follow the more standard ocarina fingering systems, as the first note of the Owlarina's scale begins with the ring finger rather than the pinky.

2-Hole Owl Voice

This system uses simply two larger holes operated with two fingers in a non-binary fashion.  Slide your fingers open and closed to partially expose the holes and achieve a range from a low A when fully closed to a high E when fully opened.  This system is not so much intended for playing melodies, but moreso playing with spirit and innovation to express your inner owl mimicking the deep voice of this mysterious bird.