Werewolves vs Vampires (WAS Lupin Oddities)

[Heather Moore]

No: HPFGUIDX 30006

--- In HPforGrownups at y..., GerRoJen at a... wrote:
> 
> *In "Fantastic Beasts and Where To Find Them" it says that werewolves are an 
> oddity because they always try to seek out human prey.
>      "Almost uniquely among fantastic creatures, the werewolf actively seeks 
> humans in preferance to any other kind of prey"  (pg. 42)


I don't *own* any of the HP books, and haven't read the two one-offs for Comic Relief yet -- so I abjectly humble myself and apologize if this question is covered by Magical Beasts. But...
   
Given that this says werewolves are "almost unique" in preying primarily on humans, what then do vampires eat in the Potterverse? Something other than human blood?  Or are vampires the "other" creatures who prey on humans?

   -- Heather 
    (Enh, there are two Heathers; I think I'll start signing myself as "Uma.")