14 MUST-KNOW Vampire Facts - Page 4

8. Vampires only need to feed twice a month to keep their thirst under control.

9. Vampire eyes change based on how much blood they have consumed recently. Black: thirsty. Red: well-fed on human blood. Gold: well-fed on animal blood. As the time since last consumption lengthens, the color fades back to black.

10. Vampires have circles under their eyes that get darker as they get thirstier. When they are well fed, the circles almost vanish.