From what I understood, they are a new Neapolitan group. Frankly, I have doubts about the voice; it makes me think that they might have sung in a metal band before, or by only listening to this piece, I might not have made an accurate judgment, which is otherwise positive for this song.
BIRD - La Danse Des Cadaveres (Official Video) I should listen to the album on BandCamp to give valid opinions.