Specimen Mechanics

Head Health

When the head health of the specimen reaches 0, its head explodes and takes additional damage. The base damage of the decapitation bonus the last damage amount plus a quarter of the specimen's max hp. It receives all damage modifiers given by perk bonuses, head shot bonus, and weapon resistances/weaknesses and its damage type is the same as the decapitating weapon. Under most circumstances, decapitation will result in an instant death. However, if the bonus damage is not sufficient to kill, a bleed out timer is started and the specimen will aimlessly wander around until the timer reaches 0. The bleed out time varies amongst specimens [1].

Specimen	Bleed Out Time (s)
Crawler, Stalker, Clot, Gorefast, Siren	5
Bloat, Husk, Scrake	6
Fleshpound	7