He has about the same health as the Conehead Zombie and heals five health per attack (25 in GW2), similar to Baron von Bats. His attack is called Vampire Bite.
These are very similar to Backup Dancers, except that they heal themselves five health after attacking a plant. (i.e., as a distraction and to help capture the garden.) Use them as you would with Browncoat Zombies.
Against[]
Vanquish him as you would with a Backup Dancer (using a bit more caution than with a Browncoat Zombie) but remember that he can heal himself five health after attacking, so try to keep some distance between you and him.