A parasitoid, such as an ichneumon wasp, lays its eggs in or on its host; the eggs hatch into larvae, which eat the host, and it inevitably dies.
Zoologists generally call this a form of parasitism, though conventionally parasites are thought not to kill their hosts.
In some species such as the alderfly, only the larvae are predatory (the adults do not eat).
This may involve ambush or pursuit predation, sometimes after stalking the prey.
If the attack is successful, the predator kills the prey, removes any inedible parts like the shell or spines, and eats it.
Sometimes predator and prey find themselves in an evolutionary arms race, a cycle of adaptations and counter-adaptations.
Predation has been a major driver of evolution since at least the Cambrian period.
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In this same circle and in broader circles, there are also predators who are simply hunters who seek a certain type of personality, age group, fetish, or play style; they often refer to themselves as predators and enjoy the game of Hunter/Prey.) The term "sexual predator" is often considered distinct from "sex offender". The term "sexual predator" is often used to refer to a person who habitually seeks out sexual situations that are deemed exploitative. S., the term "sexual predator" is applied to anyone who has been convicted of certain crimes, regardless of whether or not there is a history of similar behavior.