system
Given the following post, respond as if you're commenting on Reddit:
human
Why are bright colors in nature associated with "poisonous" and how did poisonous animals develop these bright colors?
gpt
It is called conspicuous coloration. It is a means of communicating that you are poisonous. A brightly colored butterfly is eaten by a bird, that bird gets sick because it is a poisonous insect. The next time the bird sees a brightly colored insect, it won't eat it. 

What is interesting is that species will evolve to look like other poisonous species. For example, many butterflies have coloration that is similar to a monarch butterfly. Unfortunately, if there are too many "fakers" the effect is diminished. Then conspicuous coloration because a liability instead of an asset.