Predators presumably avoid such species because they look like the poisonous ones. The examples of moths flashing their wings to expose eyespots and of snakes shaking their tails are examples in which the adaptation is behavioral. These behavioral characteristics have presumably evolved through natural selection, just as biochemical and structural characteristics have. Species interact with each other in ways other than feeding upon one another. Mutualists such as these may also evolve traits in response to one another.
Species also interact by competing with each other for resources.
In this lecture we have considered just a few of the ways in which organisms show adaptations to their environments. Now you should consider any organism, look at its characteristics, and see if you can figure out how they have adapted to their environment. You should also make sure you understand how the process of natural selection works by applying Darwin's four postulates to the examples from this lecture to explain how natural selection in the past would have led to the characteristics that are present in these species today.