As we mentioned earlier, honeybees are keystone species and they help fertilize 35% of the world's crops. However, some honeybee populations have been overtaken by what is called "killer bee" traits. These bees are more aggressive and protective of their hives because they don't want to start over and build a new one after it is destroyed by humans, which is what is happening in some parts of the world. This is said to make them more ethical than regular honeybees because they die sooner after stinging somebody. However, other people argue that is not ethical because they are still dying.