Answer and Explanation:
Butterflies, Maculinea alcon, can cheat on ants. They manage to get ants to breed their larvae, even better than their own. This capability involves a process of coevolution between both insects.
After copula, the M. alcon butterfly lays its eggs on a plant. From 4 to 10 days later, the eggs hatch, and many small caterpillars emerge from them and they start feeding on the plant´s tissues. Two or three weeks later, these larvae go to the ground at night. During this time, ants are more active, and there are more probabilities for the caterpillar to be found. This is part of the butterfly survival strategy. When the ants find the caterpillar, this last one secretes an external chemical cover, that is very similar to the ants´ one. Also, they can secrete a sweet substance that attracts ants.
When ants touch the caterpillar body with their antenna, they perceive this chemical and recognize the individual as one of them.
They take the larva to their nest where they raise it for approximately 10 months. In the nest, butterfly larvae feed on ants larvae.
When the caterpillar becomes a butterfly, it breaks its rigid cuticle to emerge. When ants find this new strange individual in their nets, they attack it, so the butterfly needs to leave the nest. Once they can fly, they mate and the reproductive cycle starts all over again.
Maculinea alcon is a highly damaging species, that might easily become invasive when they are introduced in new areas.
They are considered to be endangered because their natural environment is almost destroyed.
This process is considered to be coevolution because the strategy of this amazing species is to copy the ants´ chemical profile, while these last ones adapt to them and feed on the secreted sweet substance.