The vampires speak a completely original language. It was created for the film with the help of a linguistics professor at a New Zealand university.
Steve Niles originally conceived the story as a film. After years of rejection by studios, it was reworked into a comic book. Eventually, a studio that rejected the original screenplay went for the comic version.
Most of the night shots were shot during the day, using the day-for-night process.
In reality, Barrow (now Utqiagvik) doesn't see the sun for rough 67 days, not 30 days.
Shot in New Zealand. Nearly half of the cast is Kiwi or Australian.