A bad start. I hate when authors change what's already ingrained in the collective counsciousness. 
 Fairies are fairies. What Jay describes as fairies are NOT. 
 I understand that there are several species of evil fairies in the literature, but sill... carnivorous? Blood sucking? 
 Well, it might be a bit similar to pixies... but do they suck blood like vampires? Never heard of it...