Changes

It is common for plants to develop unpalatable or toxic characteristics to deter herbivorous predators. It is also not uncommon for some herbivores to not only develop resistance oo the aversive qualities, but also to sequester the aversive compounds themselves, so as to become unpalatable to their own predators. The classic example is the monarch butterfly, whose caterpillar feeds on toxic milkweed, which renders the butterfly toxic to birds. (the birds rapidly learn to avoid orange and black butterflies).

It is common for plants to develop unpalatable or toxic characteristics to deter herbivorous predators. It is also not uncommon for some herbivores to not only develop resistance to the aversive qualities, but also to sequester the aversive compounds themselves, so as to become unpalatable to their own predators. The classic example is the monarch butterfly, whose caterpillar feeds on toxic milkweed, which renders the butterfly toxic to birds. (the birds rapidly learn to avoid orange and black butterflies).