MZA - Howler Zombie

Hello there people! As you all know I'm doing a zombie apocalypse project at the moment, and has given me permission to use 3 of his ideas (though I will be remodelling them and such ). And I'll retexture this guy one day, it's a disappointment (the texture).

Howler Zombie
Mob Type: Hostile
Health Points: 15
Attack Damage: 1 (Easy, 13-15 Health), 2 (Normal, 13-15 Health), 3 (Hard, 13-15 Health), 2 (Easy, 10-12 Health), 3 (Normal, 10-12 Health), 5 (Hard, 10-12 Health), 2 (Easy, 6-9 Health), 4 (Normal, 6-7 Health), 6 (Hard, 6-7 Health), 2 (Easy, 1-5 Health), 5 (Normal, 1-5 Health), 8 (Hard, 1-5 Health).
Spawn: Alone in buildings/forests, In a Zombie horde
Drops: 0-2 Rotten Flesh
Rare Drops: Iron Ingot, Potato, Carrot, Iron Axe, Iron Sword
Experience: 5
The howler zombie is a complex and intelligent individual. Or, at least it would be if it wasn't a zombie. Howler zombies, amongst at least another 7 zombies, will simply act like normal zombies and try to hit you. However if they're on their own, or with at most 6 zombies, they will start howling. Now you might think that this isn't a big deal, but their howl attracts zombies from 150 blocks away. Luckily for you they can be interrupted by hitting them.