Extinction

Extinction is a event in Spore that happens when a certain number of creatures are hunted and killed by the player's creature during the Creature Stage. When the number of creatures killed needed to make a species extinct, all other remaining creatures disappear from the planet for the rest of the Creature Stage. If a extinct species has an Epic on the same planet, the epic will be afraid of you. Killing off other species is the easiest way to earn DNA Points than socializing, but that species is likely to get the Predator achievement.

However, the species can reappear in the Tribal Stage and are now hostile against your species.