What is a common trait of toxic butterflies like the Monarch?

Bright coloration is a common trait of toxic butterflies, such as the Monarch. This vivid coloration serves as a warning signal to potential predators, indicating that they possess toxins that can make them unpalatable or harmful if consumed. This warning coloration is an example of aposematism, a survival strategy where animals with toxic or harmful traits evolve to be vividly colored so they can be easily recognized and avoided by predators.

In addition, bright colors can help signal to other butterfly species that they may also be toxic or unworthy of eating. This coloration not only protects the butterflies but can also lead to learned behaviors in predators, reducing the likelihood of future encounters with similarly colored species.