on left 4 dead 2 there are new survivors

first one the spitter
health:unknown
power:to spit gas so the survivors cant see well,claw

second one is the charger
looks very much like the tank
health:500
power:to hit survivors with a charging run,claw

next one is a hidden infected on left 4 dead and it called the screamer
health:unknown
power:to run away screaming allowing a hord to come at the survivors

next one is the wondering witch
just like the witch except it walks around
health:2000
power:claws

last one the spiker or spikey
health:unknown
power:unknown