Stage One: Z1
Stage Name: Stage 1, Z1
Used names: Rotter, Slowhead, flesheater
Rate of Speed, out of Ten: 1
Rate of Strength, Out of Ten: 4 alone, 10 in group
Group, Loner, Unknown: Grouper
Chance of Death: 100 Percent
Notes: Fairly easy to kill, cut the head off, rather slow in groups and alone, do not have a strong communication system — smell identification is strong

Stage Two: Z2
Stage Name: Stage 2, Z2
Used names: Caller, Teethripper, Organswallwer
Rate of Speed, out of Ten: 5 alone, 10 in group
Rate of Strength, Out of Ten: 7 alone, 10 in group
Group, Loner, Unknown: Loner, rarely groups 
Chance of Death: 100 Percent
Notes: Fairly easy to kill, cut the head off, have some sort of internal intelligence that is used via instinct in their system, has a heightened sense of smell and hearing, will eat victims alive, will sometimes group together when pickings are low to hunt

Stage Three: Z3
Stage Name: Stage 3, Z3
Used names: Heartripper, Blooddrinker, Dog
Rate of Speed, out of Ten: 10 alone, 10 in groups
Rate of Strength, Out of Ten: 10 alone, 10 in group
Group, Loner, Unknown: Grouper — very rarely found alone 
Chance of Death: 100 Percent
Notes: Run. Hope they do not catch you. Hide.