The bullhorn acacia is a mind control flower. An enzyme in the nectar changes the physiology of stinging ants, making it impossible for them to digest any other kind of sugar. This essentially makes the insects chemically dependent on the acacia’s sweetness, which they will get as long as they protect it. The plant makes a certain chemical which makes the bugs go absolutely apeshit psychotic on command. So whenever an animal, like a giraffe, tries to eat the plant, the acacia releases the chemical and has its army bite the face off the attacker.