Turtle

 is a particularly interesting type of enemy, a lady within a trash can.

Attacks
The Turtle generally attacks by swiping when you get close or attacking with slow moving projectiles. The primary difficulty are the hordes of regular zombies typically assisting the Turtle in combat.

Tactics
The rule is simple: Keep attacking the trash can relentlessly. Ranged characters, as usual, work best, though high DPS melee characters can also work wonders. The idea is to deal as much damage as possible between her hiding in the trash can.